P7100 Replacement Battery
So you're saying a Nikon battery for the P7100 doesn't work in the P7100 because of a design fault? My P7100 battery works perfectly, stop buying fakes.
I got the similar problem. The original Nikon EN-EL14 for P7100 (marked as: NIKON CORP. CELL MADE IN JAPAN, FURTHER PROCESSED IN INDONESIA, O25A) does not work with P7100, but can be charged on MH-24 chargeres for both P7000 and P7100.
The problem is the metal connectors inside the plastic slots in the two baterries are mounted in different directions.