Burgerman wrote:With lithium you are batter never topping them up fully...
Keep them between empty and full.
I charge mine to 3.450v per cell, not 3.600v It takes a little longer, but they are still 99 percent charged but will live longer.
First time you do this it will take a while to balance, at this lower voltage. After that no problem.
What capacity did you remove (lead) and what do you have now?
How did it affect performance and range?
funkykeyboard wrote:Been having problems with my wheelchair. The battery was completely flat The other day. I was gutted, because I thought these new batteries would be the end to them kind of problems.
Anyway, got all charged up again, and I thought I would try to gauge what I am getting out of these batteries. So I went out this morning from a full charge, having charged this morning, went out along the Marine Drive, and came back past the eco-centre..
Just checked out on Google maps, and it says that is 1.8 miles. So this is not full test, but I thought I could extrapolate from that figure.
It was a bit crazy. When I first plugged the charger in, it said it was 26,430V, but then it started fluctuating between that, and about 27,150. .
This chair normally charges up to about 27,670V.
So;
27700
26400 -
01300
27700 / 1300 = 21.3
1.8 X 21 = 37.8 miles
So I can't really work out why the battery was nearly dead the other day. Strange.
The charger has peaked to say the battery is fully charged. It is still charging with a low level indication, and low-level of fan noise. At present it is saying 1.16a charging. But that is changing all the time. And the amount the batteries are at 27654V is also fluctuating all the time. Why does it do that? Is it going through the cells telling you what each cell is charged up to. Should I really leave it charging for ages and ages for all the cells to equalise? I did leave it on the other day for about 800 minutes. Does it need long charges to equalise on regular basis?
Leaving it on for ages is a problem, as I did it feel other night, my wife had to go in the other room to sleep, and the charger kept me awake all night. Will not be doing that soon.
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