Quinton

iTrader: (2)

I'm not a big electric user and can't remember what these #'s mean from my charger.
6 cell GP3300 - TrC 0314 / 8.919 V / 9.827 Vp
7 cell Racers Edge 3300 - TrC 0360 / 10.176 V / 10.993 Vp

It doesn't seem like these batteries last long anymore so I wanted to check and see if they're any good? What do those #'s tell me?
Thanks!

rwhisen

iTrader: (4)

6 Cell 3300 mAh battery 8.919 volts, 9.827 peak
7 cell 3300 mAh battery 10.176 volts, 10.933 peak

You could probably cycle them (charge/discharge) at a low rate a couple of times to see if you can improve the run time. Other than that if the batteries are old they may have seen better days.

Quinton

iTrader: (2)

Thanks!
What should the volts be on those packs?
I think I usually charge at 3 amps, and only discharge them when I run'em.

Duster_360

iTrader: (21)

A good cell should show 1.4+v, my last matched sub c SMCs were 1.482volts, so a 6 cell pac would be 8.4v and maybe a little more, 7 cell pac - 9.8v. This will drop off as they age and IR starts to creep up.

Quinton

iTrader: (2)

So would you assume my packs are still pretty good then?

rwhisen

iTrader: (4)

Seems like it but the real test is when you run them. Give them a couple of cycles and then run them to see where you stand.

Quinton

iTrader: (2)

I guess I thought they were bad because if I charge them in the evening and then put them back on the charger the next day they will take more of a charge, like 5-10 minutes.
Some of the times when I run them I don't run them all the way down either.

Duster_360

iTrader: (21)

The noticeable self discharge is something you notice with old batts. It gets worse if they've been sitting a long long time. I have a set that dumps in a few days, but they do fine if charged and then used as soon as possible.

You may see some improvement after a few cycles, you may not, hard to tell since it depends on internal condition of the cells.

Quinton

iTrader: (2)

ah so maybe it's best I charge them and then run right away.
do lipo's have this issue?