BP-BRF310SL : 1.2 volt 2000mAh NiMH AA battery with Pins, replaces Braun 0025864, 5735709 etc.

BP-BRF310SL : 1.2 volt AA rechargeable NiMH battery with snap-in Pins, replaces Braun 0025864, 5735709, 5773701, 5774701, 5779701, 5774704, 5775701, 5776702, 5777701, 67030923, 7030923, 67030834, 67030165, 4775, 5408, 5614, 5790, 5895, 5897, 5775, 5875, 5876, 5884, 390cc, 380s, 3010s, 3020s, 3040s, 3045s, 3080s, 5411, 5412, 5413, 5414, 5415, 5416, 5685, 5713, 5714, 5715, 5720, 5721, 5722, 5724, 5735, 5737, 5738, 5742, and Many More (see x-ref below). Battery snaps into place in shaver unit.
$19.95 price is for 1 cell. 
Some units require 2 batteries; check your requirement.
This battery product is Polarized, so verify proper direction of cell (+ to -) before inserting.