What battery manager can stop charging at a certain percentage?

Choon Khai March 3, 2013
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I’m looking for a battery manager that have the function where we can stop charging at certain percentage, and continue charging at another certain percentage. For example, stop charging at 100%, and only continue charge at 20%.

I want to avoid plugging the power cable, because it’s too risky. I know some battery manager do broadcast the battery percentage, but it’s a little useless if I don’t realize I overcharge..

Any idea guys?

  1. Muo TechGuy
    March 4, 2013 at 8:57 am

    Unless your battery was made in the 80's, why would you need this? It's not a problem for modern devices.

    • Choon Khai
      March 4, 2013 at 12:19 pm

      Simple, because I wanted to extend my battery life, charges to 100% then 1% drop, it charges again, and the cycle goes on.

    • Tim Brookes
      March 4, 2013 at 10:59 pm

      This is normal behaviour for all modern rechargeable batteries. The final few percent trickle charges at a slower rate, before reaching the cut-off and dropping by a few percent. This is normal and within manufacturer's specifications, and really you shouldn't worry about it.

      You will probably have replaced the device by the time battery life becomes a problem anyway.

  2. Alan Wade
    March 4, 2013 at 7:39 am

    To answer half of your question, most battery driven appliances have a shut off once they are fully charged. Its a common safety factor thats built in.
    As for a charger that wont start charging until your battery has only 20% life left in it, sorry I cannot help you with that one.

    • Choon Khai
      March 4, 2013 at 12:16 pm

      However, when it goes to 99%, it charges again.. That's the main problem.

    • Alan Wade
      March 4, 2013 at 6:58 pm

      Sorry, I dont understand, why is it a problem to keep your battery fully charged?

  3. ha14
    March 4, 2013 at 12:16 am

    the battery should have a chip inside that do allow charging control as you wish then, modern laptop do not charge beyond 100%. it is firmware and vendor specific like Lenovo

    Dell have kind of that software Dell QuickSet

    check if your laptop has similar power management option or go to Bios and chek Battery Life Extender!


    you can do it manually device manager > Batteries > Microsoft ACPI-compliant control method battery : disable and the charging will stop.

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