Why my battery full charge capacity is greater than design capacity ?

AnsPahi
AnsPahi Member Posts: 3 New User

Hello mam/sir
I have noticed today that my full charge capacity is more than design capacity

Answers

  • Puraw
    Puraw ACE, Member Posts: 14,135 Trailblazer
    edited May 7

    Design capacity is a value manually entered in the battery Smart chip by the vendor, often inflated to depict "high capacity" (sales pitch). The full charge capacity is the full charge capacity actually measured when the laptop was initialized and is normally lower than the Design capacity. When you never did a full charge cycle with a new battery the battery capacity is not registered correctly by BIOS and MS ACPI protocol resulting in incorrect energy statistics and possibly Power issues. When you start a new laptop, replace a battery or reinstall Windows you have to complete one full charge cycle only once: Disable hibernate (Fast Startup should then be disabled automatically but verify that) in "Change what closing the lid does" and in "Change settings currently unavailable", Reset the Power plan to factory default in "Edit Power Plan" and shut down, close the lid. Plug in the adapter or USB-C charger and charge till the amber battery LED turns blue (takes about 1 hour) and wait an extra 10 minutes. Boot to Windows and check that the battery meter on the taskbar reads 100% charged. Unplug the adapter/charger and work all day till the system shuts down automatically, do not shut down manually. Close the lid and plug in the adapter/charger again to charge till the amber LED turns blue plus 10 minutes. Do not open the lid and do not unplug the power. This is a full charge cycle. Make a battery report to verify the correct full charge capacity.