This battery is a 1.35 volt silver oxide replacement cell for tuning fork watches. It has a voltage controlling circuit that outputs the correct voltage to run the movements. It is powered by a silver oxide cell which is clean and friendly to the environment (unlike original mercury cell). This battery can also be use to replace the cells in 218, 219, and 2310 but one needs to check the battery strap contact points and adjust accordingly. Purchase in increments of 1.
Interchangability: PX400, EPX400, RM400, H-B, V400PX, E400N, PM400R, KX400, T400N
Accucell batteries