Replacement battery fits 325 Philips compatible models. Specifications: 2000mAh, 2.4V, Ni-MH. Compatible with: Braun 4510, Braun 4520, Braun 4525, Braun 4550, Braun 5503, Braun 5504 and 319 more compatible models. Replaces: Philips 138-10334, Philips 138-10673, Philips 138-10727, Philips 4822-138-10334, Philips 4822-138-10673, Philips 4822-138-10727 and 2 more. Philips replacement battery desig…