Charging A123 Systems LiFePO4 cells:
They are fully charged when the voltage reaches 3.45 volts and you
should never go over ~3.6 during the charge. If you stay below ~3.6
volts, you can charge these cells at whatever current you care to, just
stay below ~3.6 volts. If you go above 3.8 volts, you are not doing the
cell any favors, and you are certainly losing capacity during the time
it is above this voltage. Go over 3.9 volts and you are probably going
to start a fire. You are certainly going to burst the cell and leak
electrolyte.
These 26650 cells have cycle tested to over 16,000, 100% cycles in
the lab. (1 C charge rate, and 1 C discharge rate. 100% discharge each
cycle.) This is retaining 50% of the original capacity. Phenomenal cells.
You can drop one of these into a flashlight that normally takes two
size C cells, and make a spacer to substitute for the missing cell.
Holds a charge for several years.
Bill D.
On 4/28/2023 3:40 AM, Lawrence Rhodes via EV wrote:
I have some left over A123 Systems ANR2665M1A cells. I would like to use a
few to power some flashlights. What charger works with these cells? Seems the
specifications call for a different voltage than 18650s due to iron chemistry.
Thanks, Lawrence Rhodes
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