I had to replace a button cell, a CR1225, but I only had a CR1220.
So I just used that CR1220 in stead. This works, because a CR1220 and CR1225 differ in mechanical properties (dimension), but not in electrical properties (voltage).
Both cells have a nominal voltage of 3 Volts.
CR1220 means the following:
- C: Lithium battery
- R: Round
- 12: 12mm diameter
- 20: 2,0mm thickness
The difference between a CR1220 and CR1225 is the thickness: a CR1220 is 0,5mm slimmer than a CR1225. So a CR1220 fits in a CR1225 holder without problem.
Quickpost info
Didier Stevens 
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