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| [title] About an original battery | |
| [* black] An original 3.7V battery consists of two batteries stitched together in parallel and a protection board | |
| [* black] Protection board itself has two chips: | |
| [* black] 8205A — a Dual N-Channel MOSFET | |
| [* black] DW01A — a "lifetime" battery protection IC (over-charge, over-discharge, over-current). Funny, the datasheet on this states that it is designed for a single cell, but we do see that here it is connected to two of them. I presume this has implications on a life time in the long run. | |
| + | [* black] The battery leads are not welded, they're soldered — so you can detach the BMS board from cells easily by clipping out the leads first, to avoid any possibility of short-circuit, heating those leftovers a bit and pushing them to side. Thus you wll have a clean spot to solder a new battery leads to. |