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    First Charge of New Laptop Battery

    Bought a new battery on Amazon for a friend's Toshiba laptop (not a Toshiba battery). The user manual says something odd: "Please discharge the battery to 2% and then charge fully to 100% at the first cycle after purchasing. Do not discharge the battery pack to 0% as that will damage the battery pack and shorten its life." I can't imagine someone sitting around, looking at the charge meter and waiting for it to say 2%, then immediately plugging the AC adapter back in. What should I tell my friend to do with the battery initially?

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    WS Lounge VIP Calimanco's Avatar
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    What OS is installed on the laptop?

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    Quote Originally Posted by Calimanco View Post
    What OS is installed on the laptop?
    It's not here, but I'm fairly certain it's Win 7.

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    WS Lounge VIP Calimanco's Avatar
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    Open a command prompt as Administrator and type:-

    powercfg /batteryreport

    The command will save a battery report to C:\Users\YourName\battery report.html. Double-click the file to open it. The usage section will give you the percentage of charge remaining.

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    It's highly unlikely that the machine will allow it to discharge to 2% without shutting down first.

    Use it until you get a final warning to connect an alternate power supply and then connect the AC to fully charge.

    The laptop can be used normally during this period.

    Li-ion batteries don't have a memory - this operation is to calibrate it so when you hover over the battery icon in the system tray, the % of charge will be accurate.

    I once bought a generic laptop battery and after I'd charged it up and checked it against the free version of HWMonitor, I found it already had 4% of wear - so back it went.

    http://www.cpuid.com/softwares/hwmonitor.html

    Use the SETUP ENGLISH download button down on the left.

  6. #6
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    Great, that's what I'll tell the owner.

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