So, if your battery simply states a voltage on the label, you will have to deduce the cell count before you can charge it. If you can, it might be worth to open the battery (very, very carefully ...

Battery cells work by chemical reactions ... He says it’s not known how long this can be expected to last before the voltage drops to an unusable level, but it works! Eight-cell, 3D printed ...

Any battery that handled plate voltage was called a "B battery," regardless ... Different manufacturers used different sizes and labels, which led to absolute confusion — especially during ...