The Nokia BL-4C 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 700m Ah Compatible with the following mobile phone models: Nokia 2650, 2652, 5100, 6100, 6101, 6130, 6125, 6131, 6136, 6170, 6230, 6230i, 6260, 6300, 6600, 6125, 6260, 6670, 7200, 7270, 7610, 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.