BMW E39 and E46 keys (Commonly Known as Diamond Keys).
BMW E90/91/92/93 as well as many BMW key fobs from the early 2000's
The perfect replacement serviceable part if your battery has stopped working.
Battery Rechargeable Lithium VL2020 - ML2020
Battery Capacity: 20mAh
Battery Size Code: 2020
Battery Legs 90 Degrees
Battery Capacity: 20mAh
Battery Normal Voltage: 3V
Size: 20.01*2.24(mm)
Note:
The battery need to be soldered onto the circuit board.
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