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?

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  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
    http://www.thinkwiki.org/wiki/Tp_smapi

    Dell have kind of that software Dell QuickSet
    http://www.dell.com/support/drivers/us/en/19/driverdetails?driverid=CDJ0K

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

    BatteryCare
    http://batterycare.net/en/guide.html

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

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