Series 3 7-cell lasted 1 minute...

[BDH]

Have run it through 1 3-cycle set, voltage after discharge and recharge is about 8.18 volts.

What options to I have. Using a Thunder AC6 charger. Have a second 7-cell hump Series 3 that is on the charger now going through the same process. The batteries had not been used for 6-8 months.

Suggestions?

Thanks,
Bruce

[mike-susieq1]

i would say just charge it up and use it but dont charge more than the 3000mah 3amps charge rate. i would charge at 2amps since it hasnt been used for that long to do a slow charge. i wouldnt charge,discharge,charge the batteries as they dont get a memory effect that often to perform that even after storage.
I would charge battery then use it and charge again after cooling the battery.
voltage should be higher than 8.4v should be around 8.9v i think i know its higher than the battery voltage right off the charger.

[TreasureHunter]

If all else fails,charge it at 1/10c or at .3A for a 3000mah battery with a peak of 4mv/c hopefully the cells will equalize and regain some capicity.This charge will take a while but usually works for me,after a few cycles/runs they will be fine

[ksb51rl]

Any progress or update(s) on this problem?
It seems to me a 7-cell pack with a maximum voltage of 8.18V is either not being charged fully or has a dead/very weak cell.

[BDH]

Thanks for the suggestions. The second 7-cell turned out just great...the first, well, I'll try the slow charge and see if that will work. Let's face it...nothing to lose.
Thanks to all!
Bruce