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I did an "acpi -V" and got this for my battery. " design capacity 7800 mAh, last full capacity 6814 mAh = 87%" which looks like it's not fully charged. ...
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- 07-19-2013 #1
Resetting my laptop battery.
" design capacity 7800 mAh, last full capacity 6814 mAh = 87%" which looks like it's not fully charged. I remember seeing something about a Terminal command that'll let me totally discharge my battery then reset the 100% level and recharge to get it back to REAL full capacity. Can someone remember what those commands were? Thanks.
- 07-20-2013 #2
- Join Date
- Nov 2006
You can't simply reset the battery. Discharging completely a lithium ion battery actually kills it (don't worry, all lion batteries have a microcontroller to monitor usage so it can't be fully discharged quickly). If it only charges to 6814mAh then that's the highest charge it will accept. This is normal, and batteries lose capacity as they are used.
you can google ways to condition the battery, but practically it won't make a noticeable difference and will be a waste of time.
- 07-20-2013 #3
Conditioning a battery... I hate the term. And I hate the fact that there's not really a layman way to explain it. I don't get it all myself either.
Here ya go... Lithium batteries in laptops or cell-phones, on occasion, need to drain 100%. Like... let the device die from lack of charge.
Most newer devices include a piece of firmware that monitors battery charge... but if there is no zero charge, then there is no way to accurately monitor what would be considered a full charge.
- 07-20-2013 #4
If this is the laptop you traded the bb gun for. Then that sounds about right because of age. If you wanna try this
Netbook battery won't charge past 70%.
be my guest.
I remember seeing something about a Terminal command that'll let me totally discharge my battery then reset the 100% level and recharge to get it back to REAL full capacity. Can someone remember what those commands were? Thanks
$ acpi -v The program 'acpi' is currently not installed. You can install it by typing: sudo apt-get install acpi
cd /sys/class/power_supply/BAT1 harry@biker /sys/class/power_supply/BAT1 $ ls alarm current_now model_name status uevent charge_full cycle_count power subsystem voltage_min_design charge_full_design device present technology voltage_now charge_now manufacturer serial_number type
- 07-20-2013 #5
- Join Date
- Nov 2006
You can't go any further than http : // batteryuniversity.com /learn/article/how_to_prolong_lithium_based_batteries
Quote from battery university:The aging process of lithium-ion is cell oxidation, a process that occurs naturally as part of usage and aging and cannot be reversed.
- 07-21-2013 #6
I just checked with the extra battery that he threw with the deal using "acpi -V" and got this "design capacity 6600 mAh, last full capacity 6930 mAh = 100%", it's actually MORE then it's designed to be, LOL.
Guess it all works out in the end.