Laminated LiMn cells - 4.4V max, 3.85V Nominal

I got my hands on a few hundred LiMn2O4 laminated cells - 80x60x5mm with a 2x4mm negative button terminal on top. They're rated from 3450 to 3600 mAh, butare supposed to be charged to 4.4V max (nominal3.85V). Anyone know of any chargers or testers that can be adjusted to work to these voltages? Or have a good charger schematic I could adjust to build a charging/capacity testingboard from? Also, any advice on a reasonable cutoff voltage for these cells?

The opus can be set to 4.35V, I think it is. There's an internal switch to select that voltage.

As far as cutoff voltages, you should look up the datasheet for those cells. It should tell you when to shift from CC to CV. That's when the top cutoff would be at. Then use the standard bottom cutoff.
I would guess it's probably 4.25V - 3.4V. But, that's a guess.

Please take pictures of one for the cell database!
https://secondlifestorage.com/t-Cell-Database-Submissions-and-Updates

mike said:

Please take pictures of one for the cell database!
https://secondlifestorage.com/t-Cell-Database-Submissions-and-Updates

Click to expand...

Done.