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  • REUSE YOUR OLD LAPTOP BATTERY TO MAKE A POWER BANK

    Thank you very much for the answer and for your;s post in instructables.i have got many questions...But i don't want to be a trouble.I want your opinion..I have also other one 18650 battery CGR18650CG Li-ion MH12210.I charged it and test it with battery capacity tester like yours and it has been charged 4,13v in 2 1/2 hours and 1300 mha.After i charged my phone with this in powerbank and it charged 35%(2100 mha phonebattery) for 40-45 minutes and 760 mha and battery discharged at 3,45v.I tried to empty this battery with a usb lamp and it discharged in 40 minutes at 3,09volt and 140 mha.I charged it again and i got in 3 hours 1620mha 4,14v.I charged again my phone and it charged 35% in 45-50 minutes with 752 mha and battery discharged at 3,42v.Is it normal?The half capacity from battery ...see more »Thank you very much for the answer and for your;s post in instructables.i have got many questions...But i don't want to be a trouble.I want your opinion..I have also other one 18650 battery CGR18650CG Li-ion MH12210.I charged it and test it with battery capacity tester like yours and it has been charged 4,13v in 2 1/2 hours and 1300 mha.After i charged my phone with this in powerbank and it charged 35%(2100 mha phonebattery) for 40-45 minutes and 760 mha and battery discharged at 3,45v.I tried to empty this battery with a usb lamp and it discharged in 40 minutes at 3,09volt and 140 mha.I charged it again and i got in 3 hours 1620mha 4,14v.I charged again my phone and it charged 35% in 45-50 minutes with 752 mha and battery discharged at 3,42v.Is it normal?The half capacity from battery charged my phone,what happened with the rest capacity from battery?Also the volt that appears in battery tester capacity is 4,97volt and this lower in charging duration .When i unplug from phone is 5,06volt.

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  • REUSE YOUR OLD LAPTOP BATTERY TO MAKE A POWER BANK

    hi,i opened a old battery from laptop and i took the batteries for a diy powerbank.I measured the batteries and 5 was 3,93-3,98 volt and one 3,82volt.I charged them,they came at 4,1-4,2 volt and after 2 days lower them at 4,08-4,10.Can i used them at powerbank or they are fualty?i tried 3 of them but they charged my phone only for 3% for 10-15 minutes.The volt of them after the charge was 3,7volt.

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