The Motorola BA-600 is a high quality non-genuine replacement lithium-ion rechargeable mobile phone battery. This replacement battery is manufactured to CE & UL standards, is ROHS compliant & can be used as a cost effective alternative to genuine branded batteries. Specifications: 3.7v 850m Ah Compatible with the following mobile phone models: Motorola A780, E550, V300, V500, V525, V545, V547, V550, V60, V600, V600i, V620, V635 Please note: New batteries will achieve optimum performance after two or three complete charge & discharge cycles. * Figures are approximate & are dependent on SIM card, phone model & settings, network & usage.