Good to hear that.
I got 10k miles out of my UB121100 (110 Ah) batteries with my US
Electricar (Chevy S10 factory converted) before the range was
unacceptable.
Cor.
On Sat, Dec 11, 2021 at 4:16 PM Ken Olum via EV wrote:
>
> Thanks for all the advice. I seem to have got off lucky. My chargers
>
Thanks for all the advice. I seem to have got off lucky. My chargers
charged up these batteries without trouble. Today I discharged my pack
for 5 hours at 20A. Both undamaged batteries seemed worse than both
"damaged" batteries. By the end of this test, the undamaged batteries
were down to 11.
I have reversed UB batteries in the past, in an EV with a *long*
series string of batteries (312V, so 26x UB121100) and if a cell has
been reversed, it loses capacity and thus will reverse earlier next
time. You will find such cells by checking for warmer compartments in
the 6-cell battery cases.
O
A 12v battery is considered flat when its open circuit voltage is 11.8
volts. Since yours were at ~5 volts, it's fairly likely that you've
reversed some cells. That's most definitely not good.
Still, you might get lucky, and it can't hurt to give them a long, slow
equalizing charge. Cycle th
The longer any lead-acid battery sits at lower SoCs, the more it
sulphates. Level of discharge X time, and it's cumulative. This is also
why it's super important to have the absorption phase to fully charge it,
otherwise it's "not quite charged" and it will still slowly sulphate.
Only way to kn
Hi, all. In my Electric Ox I have 4 12V 135Ah AGM batteries from
Universal Battery. I got this set in April 2019, so they've been
through 3 summers of mowing and two winters of snowblowing (which puts a
lot more stress on them). My previous set lasted 10 years, though they
were showing their age
