The Sony-Ericsson BST-25 Equivalent Mobile Phone Battery by Ansmann (A-Eso 1) is a high quality rechargeable Li-Ion battery comparable in
Specification to the original manufacturers version. Li-Ion battery compatible with the following Sony-Ericsson products: T606 / T608 / T610 / T618 / T628 / T630 / T637. Voltage: 3.7V Capacity: 500m Ah This cost effective Ansmann branded battery provides, high capacity, long cycle life & a safety 'printed circuit board' for protection against battery leakage. Also available: Ansmann mains & car chargers for your mobile phones.