are these cells balaced for my my diy power bank ?

Batteries and Chargers Rechargeable Batteries
1

hi

i have a 5 cell diy power bank.

i have extracted some cells from a laptop battery. i charged them using 500ma and then let them rest for few hours .. then discharged them at 500ma below are result.


discharge took 4:11 hour:minutes 2069mah
discharge took 4:14 hour:minutes 2098mah
discharge took 4:15 hour:minutes 2102mah
discharge took 4:06 hour:minutes 2048mah
discharge took 4:17 hour:minutes 2139mah

are they balanced for this power bank ?

2

that third cell is a bit wonky however, if the cells are all in parallel, you should be fine. Cells are more of a danger when they are in series and one or more can be seriously overdischaged.