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By Addy Osmani and Hassan Djirdeh

Code Smart, Scale Fast, Conquer Challenges

Learn tools and techniques to build and maintain large-scale React web applications.

Or  for free.
Building Large Scale Web Apps: A React Field Guide. By Addy Osmani and Hassan Djirdeh

“Building Large Scale Web Apps” is a toolkit to managing large-scale React applications.

React as a library allows you to start building user interfaces quickly and easily. But how do things scale as an application grows? How do you ensure that your codebase remains manageable, your performance metrics stay on point, and your team continues to work cohesively as the project evolves?

In this book, you'll uncover strategies that industry professionals use to build scalable, performant, and maintainable React applications, all without becoming overwhelmed by complexity.

Together, we've spent well over two decades building within or consulting for

The Google logo.
The Doordash logo.
The Instacart logo.
The Netflix logo.
The X logo.
The YouTube logo.
The Shopify logo.
The Ebay logo.

Used to charge the battery.

  • Cut-off Current: Usually set automatically (usually 10% of set current). When current drops below this, charging stops.
  • We’ve scanned the web for safe, no-cost downloads. Avoid shady forums that require credit cards or “free trial” signups. Here are the verified methods:

    This is the main header. Press Start/Enter to access the sub-menus.

    Before plugging anything in, familiarize yourself with the hardware. The Proe 2 is designed to be rugged but contains sensitive electronics.

    If you can’t find the PDF immediately, here are fixes for top three ProE 2 issues reported by users:

    If these don’t solve the issue, download the full manual for advanced diagnostics (like resetting the BMS via the hidden pinhole).


    Summary

    What’s good

    What’s lacking / could be improved

    Accuracy and usability

    Who it’s for

    Verdict

    The BatPower ProE 2 is a high-capacity portable power bank designed primarily for high-drain devices like Microsoft Surface laptops and MacBooks . While a specific, standalone digital "long article" manual is not hosted on a single public page, its core operational instructions and specifications are consolidated below from official documentation and technical listings. Core Specifications

    Capacities: Available in three versions: 98Wh (26,800mAh), 148Wh (40,000mAh), and 210Wh (56,000mAh) . Output Ports: DC Port: 15V–20V Max 95W (for laptops) .

    QC USB Port: 5V/9V/12V Max 36W for fast-charging smartphones/tablets .

    Dual USB-A Ports: 5V Max 24W for standard device charging . Physical Specs: The 98Wh model (ES7B) measures inches and weighs approximately 15oz . Operational Instructions Charging Your Laptop:

    Connect the appropriate DC charging cable (MagSafe 1/2 for Mac or the Surface connector for Microsoft) to the ProE 2's DC output port . Connect the other end to your laptop.

    Press the power button on the battery pack to initiate charging. A flashing LED or battery icon on your device should confirm the connection . Charging USB Devices:

    Plug your USB cable into the QC port for fast charging or the standard USB-A ports .

    The device supports simultaneous charging and discharging, meaning you can charge the power bank while it charges your phone . Battery Maintenance:

    Storage: If not in use, charge the battery at least once every 3 months to prevent cell degradation .

    Heat Safety: Do not use the charger inside a bag or enclosed container; it requires free air access to prevent overheating . Troubleshooting & Safety Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    an 24W USB QC ports and two 12W USB QA ports provide optimized charging to phones, tablets, and more. BatPower ProE 2 Portable Power Pack - 6 Month Update

    Unlocking the Full Potential of Your Device: A Comprehensive Guide to Batpower Proe 2 User Manual Free

    In today's fast-paced world, staying connected and productive on-the-go is more crucial than ever. With the rise of portable power banks, users can now enjoy uninterrupted usage of their devices, even when they're away from a power source. One such innovative product that has gained significant attention in recent times is the Batpower Proe 2. This article aims to provide a detailed overview of the Batpower Proe 2 user manual, available for free download, and help users unlock the full potential of their device.

    Introduction to Batpower Proe 2

    The Batpower Proe 2 is a high-capacity power bank designed to charge devices on-the-go. With its sleek and compact design, this portable charger is perfect for travelers, outdoor enthusiasts, and individuals who require a reliable source of power throughout the day. The device features a robust 20000mAh battery, capable of charging smartphones, tablets, and other devices multiple times.

    Downloading the Batpower Proe 2 User Manual Free

    To ensure users get the most out of their Batpower Proe 2, it's essential to have access to the user manual. The good news is that the Batpower Proe 2 user manual is available for free download from the manufacturer's website or other online sources. By downloading the manual, users can gain a deeper understanding of the device's features, operation, and safety precautions.

    Batpower Proe 2 User Manual: Key Features and Instructions

    The Batpower Proe 2 user manual provides comprehensive information on the device's features, including:

    Understanding the Batpower Proe 2's Features

    The Batpower Proe 2 comes with several innovative features that make it an excellent choice for users on-the-go. Some of the key features include:

    Tips and Tricks for Using the Batpower Proe 2

    To get the most out of the Batpower Proe 2, here are some valuable tips and tricks:

    Conclusion

    The Batpower Proe 2 is an excellent portable power bank that offers users a reliable source of power on-the-go. By downloading the Batpower Proe 2 user manual free, users can unlock the full potential of their device and enjoy a seamless charging experience. Whether you're a busy professional, an outdoor enthusiast, or a traveler, the Batpower Proe 2 is an essential accessory that can keep your devices charged and ready to use.

    Download the Batpower Proe 2 User Manual Free Today!

    Don't miss out on the opportunity to get the most out of your Batpower Proe 2. Download the user manual free today and discover the full range of features and capabilities that this innovative device has to offer.

    FAQs

    By following the guidelines and tips outlined in this article, users can ensure they get the most out of their Batpower Proe 2 and enjoy a hassle-free charging experience. Download the Batpower Proe 2 user manual free today and start exploring the full potential of your device!

    While there isn't a single "useful story" published as a book or article for the BatPower ProE 2, its user manual details are available through manufacturer support and various online retailers. The "story" of this device is often told through user experiences: it acts as a "lifesaver" for remote workers and travelers needing to power MacBooks or Microsoft Surface devices. Essential Manual Instructions

    Capacity Options: The BatPower ProE 2 series includes three main models: EX7 (98Wh/26,800mAh), EX10 (148Wh/40,000mAh), and EX15 (210Wh/56,000mAh).

    Voltage Switching: For MacBook users, a multi-function button manages output. A Green LED indicates 16.5V–20V (MacBook Pro), while a Red LED indicates 15V (MacBook Air).

    Port Layout: It typically features one DC port (up to 90W) for laptops, one QC 3.0 USB port (orange) for fast charging phones, and two AQ USB ports (blue) for tablets and other devices.

    Flashlight Feature: You can activate the built-in LED flashlight by pressing and holding the main button for 5 seconds. Battery Care & Safety Tips

    To ensure the longevity of the battery, BatPower recommends several maintenance steps:

    Charge Frequency: Recharge the unit at least every 3 months if it is not being used to prevent deep discharge damage.

    Cooldown Period: Avoid recharging the device immediately after it has been fully discharged; let it cool for a few minutes first.

    Operating Surface: Do not use the battery while it is laying flush against a soft surface (like a bed); keeping it on a hard surface helps it run cooler.

    Storage: Store in a dry, clean place at room temperature (approx. 70°F/20°C) away from metal objects.

    If you need a full electronic PDF copy, the manufacturer recommends sending a request directly to support@batpower.com. Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    The BatPower ProE 2 Go to product viewer dialog for this item.

    series is a high-capacity portable charging system designed for laptops, tablets, and smartphones. It features massive power delivery (up to 140W total) and a modular design that supports specific laptop lines like the Microsoft Surface and 2006–2015 MacBooks. Key Specifications and Capacity Options

    is available in three distinct capacities to suit different travel needs: ES7 / EX7: 98Wh / 26,800mAh (TSA-approved for air travel). ES10 / EX10: 148Wh / 40,000mAh for extended remote work. ES15 / EX15: 210Wh / 56,000mAh for maximum power endurance. Charging Features & Port Configuration

    The device serves as a central hub for all your electronics with the following outputs: Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    BatPower ProE 2 is a high-capacity external battery series (ranging from 98Wh to 210Wh) designed for laptops like Microsoft Surface, MacBooks, and Dell, as well as mobile devices. Accessing the User Manual

    While BatPower typically includes a physical manual in the package, you can access digital versions or support through the following methods: Direct PDF Downloads BatPower ProE 2 User Manual (General) BatPower ProE 2 Instruction Manual (Alternative) Email Request

    : If you need a specific electronic version, you can contact support@batpower.com Quick Start & Operation Guide Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    The BatPower ProE 2 is a high-performance external battery pack designed specifically for power-hungry laptops like the MacBook Pro, MS Surface, and various gaming rigs. While these devices usually come with a physical guide, losing it is common.

    This comprehensive guide serves as your unofficial digital manual, covering setup, safety, and troubleshooting to ensure you get the most out of your portable power station. 🔋 What’s in the Box?

    Before diving into the technical steps, ensure your ProE 2 package includes the following essentials:

    BatPower ProE 2 Power Bank (Available in various capacities like 210Wh or 160Wh).

    90W Ac Adapter/Charger (Used to recharge the power bank itself).

    Magsafe 2 or USB-C Cables (Depending on the specific model kit purchased).

    Surface Adapter Cables (If purchased for Microsoft devices). Protective Pouch and DC power cables. ⚡ Quick Start Guide: Charging Your Devices

    The ProE 2 is famous for its versatility. Follow these steps to power your hardware safely: For MacBooks (Magsafe 1, Magsafe 2, or USB-C) Locate the DC Output Port on the side of the BatPower unit.

    Connect the BatPower-specific charging cable to the DC port. Plug the other end into your MacBook.

    Press the Power Button once to begin the handshake and initiate charging. For MS Surface Devices Use the dedicated Surface DC cable provided in the kit.

    Ensure the connector is seated firmly; the ProE 2 will auto-detect the voltage required for Surface Pro or Surface Book models. For Smartphones and Tablets (USB Ports)

    Plug your standard USB-A or USB-C cable into the designated ports.

    The ProE 2 supports Quick Charge (QC) technologies for compatible mobile devices. 🔌 Recharging the BatPower ProE 2

    To maintain battery health, use only the provided BatPower AC adapter. Connect the AC adapter to a wall outlet.

    Plug the barrel connector into the Input Port on the ProE 2. The LED indicator lights will flash in sequence. A solid four-light display indicates a 100% charge.

    Note: It typically takes 2.5 to 3.5 hours to fully recharge the unit from empty, depending on the specific capacity of your model. đź›  Troubleshooting Common Issues The Power Bank Won't Turn On

    Check Charge Level: Press the power button. If no lights flash, the unit is in "Deep Sleep" or empty. Recharge it for 30 minutes and try again.

    Reset the Logic: Hold the power button down for 10–15 seconds to reset the internal controller. Slow Charging on Laptop

    Cable Integrity: Ensure you are using the original BatPower DC cable. Third-party cables often lack the gauge necessary to carry high wattage.

    Heat Regulation: If the unit is too hot, it will throttle speeds. Move it to a cool, ventilated area. Not Charging MacBook Check the Magsafe connector for debris or dust.

    Ensure the ProE 2 is turned ON before plugging it into the laptop. ⚠️ Essential Safety Guidelines

    Avoid Moisture: The ProE 2 is not waterproof. Keep it away from liquids.

    Temperature Range: Do not leave the battery in a hot car. Lithium-ion cells degrade quickly above 110°F (43°C).

    Flight Safety: Most ProE 2 models are designed to meet TSA/FAA guidelines (under 160Wh), but always check your specific model’s Wh rating before flying.

    Storage: If not using the device for a long time, store it at 50–70% charge. Never store it completely empty.

    If you're looking for information on a specific laptop model compatibility or need help identifying which cable you have, tell me:

    What is the exact model of your laptop? (e.g., MacBook Pro 2021, Surface Pro 7)

    What is the Wh (Watt-hour) rating printed on the back of your BatPower? Are you seeing a specific error light pattern?

    Here is the useful guide you can print or save:


    Connect the AC power cord to the wall outlet. You will hear a beep, and the LCD will light up, displaying the initial logo.

    Some other things!

    Descriptive content, continous updates, and soundbites from industry professionals.

    Descriptive, not prescriptive

    When explaining content, we follow a descriptive approach, not prescriptive. In other words, we don’t tell you what specific tools or libraries you have to use to be successful. Rather, we focus on explaining a concept and employ certain libraries or tools to illustrate that concept.

    React-focused with universal concepts

    While the book is React-focused, it teaches universal concepts that transcend all web development frameworks. It's designed to enhance your understanding of building web applications that are scalable, maintainable, and adaptable, regardless of the specific technology stack.

    Continous, frequent updates

    Purchasing the e-book gives you access to all new content, edits, and improvements forever. In fact, we're currently working on adding three new chapters soon — Routing, User-centric API design, and React in 2024. Check out the Changelog to follow along on all the updates we'll make.

    Soundbites from industry professionals

    In the book, we share soundbites and thoughts from industry professionals. These soundbites are shared from start-up owners and software engineers who work at Doordash, Netflix, Spotify, and more.

    Back cover of physical book
    Front cover of physical book
    Back cover of physical book
    Contents of physical book

    Industry nuggets

    Nuggets of wisdom from industry professionals

    Jem Young

    Maxi Ferreira

    Emma Bostian

    Zeno Rocha

    Francine Navarro

    Jeffrey Peng

    And others!

    Batpower Proe 2 User Manual Free Review

    Used to charge the battery.

  • Cut-off Current: Usually set automatically (usually 10% of set current). When current drops below this, charging stops.
  • We’ve scanned the web for safe, no-cost downloads. Avoid shady forums that require credit cards or “free trial” signups. Here are the verified methods:

    This is the main header. Press Start/Enter to access the sub-menus.

    Before plugging anything in, familiarize yourself with the hardware. The Proe 2 is designed to be rugged but contains sensitive electronics.

    If you can’t find the PDF immediately, here are fixes for top three ProE 2 issues reported by users:

    If these don’t solve the issue, download the full manual for advanced diagnostics (like resetting the BMS via the hidden pinhole).


    Summary

    What’s good

    What’s lacking / could be improved

    Accuracy and usability

    Who it’s for

    Verdict

    The BatPower ProE 2 is a high-capacity portable power bank designed primarily for high-drain devices like Microsoft Surface laptops and MacBooks . While a specific, standalone digital "long article" manual is not hosted on a single public page, its core operational instructions and specifications are consolidated below from official documentation and technical listings. Core Specifications

    Capacities: Available in three versions: 98Wh (26,800mAh), 148Wh (40,000mAh), and 210Wh (56,000mAh) . Output Ports: DC Port: 15V–20V Max 95W (for laptops) .

    QC USB Port: 5V/9V/12V Max 36W for fast-charging smartphones/tablets .

    Dual USB-A Ports: 5V Max 24W for standard device charging . Physical Specs: The 98Wh model (ES7B) measures inches and weighs approximately 15oz . Operational Instructions Charging Your Laptop:

    Connect the appropriate DC charging cable (MagSafe 1/2 for Mac or the Surface connector for Microsoft) to the ProE 2's DC output port . Connect the other end to your laptop.

    Press the power button on the battery pack to initiate charging. A flashing LED or battery icon on your device should confirm the connection . Charging USB Devices:

    Plug your USB cable into the QC port for fast charging or the standard USB-A ports .

    The device supports simultaneous charging and discharging, meaning you can charge the power bank while it charges your phone . Battery Maintenance:

    Storage: If not in use, charge the battery at least once every 3 months to prevent cell degradation .

    Heat Safety: Do not use the charger inside a bag or enclosed container; it requires free air access to prevent overheating . Troubleshooting & Safety Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    an 24W USB QC ports and two 12W USB QA ports provide optimized charging to phones, tablets, and more. BatPower ProE 2 Portable Power Pack - 6 Month Update batpower proe 2 user manual free

    Unlocking the Full Potential of Your Device: A Comprehensive Guide to Batpower Proe 2 User Manual Free

    In today's fast-paced world, staying connected and productive on-the-go is more crucial than ever. With the rise of portable power banks, users can now enjoy uninterrupted usage of their devices, even when they're away from a power source. One such innovative product that has gained significant attention in recent times is the Batpower Proe 2. This article aims to provide a detailed overview of the Batpower Proe 2 user manual, available for free download, and help users unlock the full potential of their device.

    Introduction to Batpower Proe 2

    The Batpower Proe 2 is a high-capacity power bank designed to charge devices on-the-go. With its sleek and compact design, this portable charger is perfect for travelers, outdoor enthusiasts, and individuals who require a reliable source of power throughout the day. The device features a robust 20000mAh battery, capable of charging smartphones, tablets, and other devices multiple times.

    Downloading the Batpower Proe 2 User Manual Free

    To ensure users get the most out of their Batpower Proe 2, it's essential to have access to the user manual. The good news is that the Batpower Proe 2 user manual is available for free download from the manufacturer's website or other online sources. By downloading the manual, users can gain a deeper understanding of the device's features, operation, and safety precautions.

    Batpower Proe 2 User Manual: Key Features and Instructions

    The Batpower Proe 2 user manual provides comprehensive information on the device's features, including:

    Understanding the Batpower Proe 2's Features

    The Batpower Proe 2 comes with several innovative features that make it an excellent choice for users on-the-go. Some of the key features include:

    Tips and Tricks for Using the Batpower Proe 2

    To get the most out of the Batpower Proe 2, here are some valuable tips and tricks:

    Conclusion

    The Batpower Proe 2 is an excellent portable power bank that offers users a reliable source of power on-the-go. By downloading the Batpower Proe 2 user manual free, users can unlock the full potential of their device and enjoy a seamless charging experience. Whether you're a busy professional, an outdoor enthusiast, or a traveler, the Batpower Proe 2 is an essential accessory that can keep your devices charged and ready to use.

    Download the Batpower Proe 2 User Manual Free Today!

    Don't miss out on the opportunity to get the most out of your Batpower Proe 2. Download the user manual free today and discover the full range of features and capabilities that this innovative device has to offer.

    FAQs

    By following the guidelines and tips outlined in this article, users can ensure they get the most out of their Batpower Proe 2 and enjoy a hassle-free charging experience. Download the Batpower Proe 2 user manual free today and start exploring the full potential of your device!

    While there isn't a single "useful story" published as a book or article for the BatPower ProE 2, its user manual details are available through manufacturer support and various online retailers. The "story" of this device is often told through user experiences: it acts as a "lifesaver" for remote workers and travelers needing to power MacBooks or Microsoft Surface devices. Essential Manual Instructions

    Capacity Options: The BatPower ProE 2 series includes three main models: EX7 (98Wh/26,800mAh), EX10 (148Wh/40,000mAh), and EX15 (210Wh/56,000mAh).

    Voltage Switching: For MacBook users, a multi-function button manages output. A Green LED indicates 16.5V–20V (MacBook Pro), while a Red LED indicates 15V (MacBook Air).

    Port Layout: It typically features one DC port (up to 90W) for laptops, one QC 3.0 USB port (orange) for fast charging phones, and two AQ USB ports (blue) for tablets and other devices. Used to charge the battery

    Flashlight Feature: You can activate the built-in LED flashlight by pressing and holding the main button for 5 seconds. Battery Care & Safety Tips

    To ensure the longevity of the battery, BatPower recommends several maintenance steps:

    Charge Frequency: Recharge the unit at least every 3 months if it is not being used to prevent deep discharge damage.

    Cooldown Period: Avoid recharging the device immediately after it has been fully discharged; let it cool for a few minutes first.

    Operating Surface: Do not use the battery while it is laying flush against a soft surface (like a bed); keeping it on a hard surface helps it run cooler.

    Storage: Store in a dry, clean place at room temperature (approx. 70°F/20°C) away from metal objects.

    If you need a full electronic PDF copy, the manufacturer recommends sending a request directly to support@batpower.com. Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    The BatPower ProE 2 Go to product viewer dialog for this item.

    series is a high-capacity portable charging system designed for laptops, tablets, and smartphones. It features massive power delivery (up to 140W total) and a modular design that supports specific laptop lines like the Microsoft Surface and 2006–2015 MacBooks. Key Specifications and Capacity Options

    is available in three distinct capacities to suit different travel needs: ES7 / EX7: 98Wh / 26,800mAh (TSA-approved for air travel). ES10 / EX10: 148Wh / 40,000mAh for extended remote work. ES15 / EX15: 210Wh / 56,000mAh for maximum power endurance. Charging Features & Port Configuration

    The device serves as a central hub for all your electronics with the following outputs: Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    BatPower ProE 2 is a high-capacity external battery series (ranging from 98Wh to 210Wh) designed for laptops like Microsoft Surface, MacBooks, and Dell, as well as mobile devices. Accessing the User Manual

    While BatPower typically includes a physical manual in the package, you can access digital versions or support through the following methods: Direct PDF Downloads BatPower ProE 2 User Manual (General) BatPower ProE 2 Instruction Manual (Alternative) Email Request

    : If you need a specific electronic version, you can contact support@batpower.com Quick Start & Operation Guide Surface Portable Charger External Battery 98Wh-148Wh-210Wh

    The BatPower ProE 2 is a high-performance external battery pack designed specifically for power-hungry laptops like the MacBook Pro, MS Surface, and various gaming rigs. While these devices usually come with a physical guide, losing it is common.

    This comprehensive guide serves as your unofficial digital manual, covering setup, safety, and troubleshooting to ensure you get the most out of your portable power station. 🔋 What’s in the Box?

    Before diving into the technical steps, ensure your ProE 2 package includes the following essentials:

    BatPower ProE 2 Power Bank (Available in various capacities like 210Wh or 160Wh).

    90W Ac Adapter/Charger (Used to recharge the power bank itself).

    Magsafe 2 or USB-C Cables (Depending on the specific model kit purchased).

    Surface Adapter Cables (If purchased for Microsoft devices). Protective Pouch and DC power cables. ⚡ Quick Start Guide: Charging Your Devices

    The ProE 2 is famous for its versatility. Follow these steps to power your hardware safely: For MacBooks (Magsafe 1, Magsafe 2, or USB-C) Locate the DC Output Port on the side of the BatPower unit. Cut-off Current: Usually set automatically (usually 10% of

    Connect the BatPower-specific charging cable to the DC port. Plug the other end into your MacBook.

    Press the Power Button once to begin the handshake and initiate charging. For MS Surface Devices Use the dedicated Surface DC cable provided in the kit.

    Ensure the connector is seated firmly; the ProE 2 will auto-detect the voltage required for Surface Pro or Surface Book models. For Smartphones and Tablets (USB Ports)

    Plug your standard USB-A or USB-C cable into the designated ports.

    The ProE 2 supports Quick Charge (QC) technologies for compatible mobile devices. 🔌 Recharging the BatPower ProE 2

    To maintain battery health, use only the provided BatPower AC adapter. Connect the AC adapter to a wall outlet.

    Plug the barrel connector into the Input Port on the ProE 2. The LED indicator lights will flash in sequence. A solid four-light display indicates a 100% charge.

    Note: It typically takes 2.5 to 3.5 hours to fully recharge the unit from empty, depending on the specific capacity of your model. đź›  Troubleshooting Common Issues The Power Bank Won't Turn On

    Check Charge Level: Press the power button. If no lights flash, the unit is in "Deep Sleep" or empty. Recharge it for 30 minutes and try again.

    Reset the Logic: Hold the power button down for 10–15 seconds to reset the internal controller. Slow Charging on Laptop

    Cable Integrity: Ensure you are using the original BatPower DC cable. Third-party cables often lack the gauge necessary to carry high wattage.

    Heat Regulation: If the unit is too hot, it will throttle speeds. Move it to a cool, ventilated area. Not Charging MacBook Check the Magsafe connector for debris or dust.

    Ensure the ProE 2 is turned ON before plugging it into the laptop. ⚠️ Essential Safety Guidelines

    Avoid Moisture: The ProE 2 is not waterproof. Keep it away from liquids.

    Temperature Range: Do not leave the battery in a hot car. Lithium-ion cells degrade quickly above 110°F (43°C).

    Flight Safety: Most ProE 2 models are designed to meet TSA/FAA guidelines (under 160Wh), but always check your specific model’s Wh rating before flying.

    Storage: If not using the device for a long time, store it at 50–70% charge. Never store it completely empty.

    If you're looking for information on a specific laptop model compatibility or need help identifying which cable you have, tell me:

    What is the exact model of your laptop? (e.g., MacBook Pro 2021, Surface Pro 7)

    What is the Wh (Watt-hour) rating printed on the back of your BatPower? Are you seeing a specific error light pattern?

    Here is the useful guide you can print or save:


    Connect the AC power cord to the wall outlet. You will hear a beep, and the LCD will light up, displaying the initial logo.

    Who we are

    Heyo! We're Addy & Hassan — Engineers & Educators.

    Profile picture of Addy Osmani

    AddyOsmani

    I'm an engineering leader working on Google Chrome and I lead up Chrome's Developer Experience organization, helping reduce the friction for developers to build great user experiences.

    HassanDjirdeh

    I'm a senior software engineer and have built large production web applications at organizations like Doordash, Instacart, and Shopify.

    Profile picture of Addy Osmani

    Pick your package

    “Building Large Scale Web Apps” is available in either an e-book or as a physical copy.

    E-book

    Great for digital learners.

    $24.99USD

    • 300+ pages
    • PDF or EPub (or both)
    • All future updates
    Buy with Leanpub Or buy with Apple Books or Google Play

    Physical copy (softcover)

    Perfect for hands-on referencers.

    $49.99USD

    • 300+ pages
    • Softcover
    • Something to put on your bookshelf
    • Interested in both the e-book and physical copy? Purchase both separately!
    Buy Physical Copy

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