Lithium Polymer cells like this are defined by their nominal dimensions encoded in the part number. If you get the same part number, or close enough that will fit in the given space, you can use any brand. At worst, you will have to swap connectors if you can’t find a replacement with the same connector. Also, be careful of polarity; your replacement cell might have the same connector with the wires swapped. If you have that issue, changing them around is simple, only requiring a small pointed tool, a bit of dexterity, and care not to let the leads short together during the swap.
part number breaks down as:
digits 1 & 2 = thickness, mm, x 10
digits 3 & 4 = width, mm
digits 5 & 6 = length, mm, nominal (usually up to about 5 mm longer because of the little circuit board at the end with the leads)
So, 382527 is-
3.8 mm thick
25 mm wide
nominally 27 mm long
Different brands may have different capacities (mAh), and technology is constantly improving so by the time you need a new battery you might be able to find even higher capacity than is available today. A higher mAh number won’t hurt anything, and will give you longer standby and talk time.
