Sony Ericsson BST-37/ DPY901526/ BKB19320311 battery Black Standard capacity Lithium-Polymer battery is the factory original battery designed & built specifically for the Sony Ericsson J220/ K750/ K750i/ W600/ W600c/ W710/ W800/ W800i/ W810i/ Z300/ Z520/ Z525/ Z710 cell phone models.Sony Ericsson BST-37/ DPY901526/ BKB19320311 Li-Polymer Black Standard battery provides your Sony Ericsson J220/ K750/ K750i/ W600/ W600c/ W710/ W800/ W800i/ W810i/ Z300/ Z520/ Z525/ Z710 cell phone with the standard battery capacity that originally shipped with most Sony Ericsson J220/ K750/ K750i/ W600/ W600c/ W710/ W800/ W800i/ W810i/ Z300/ Z520/ Z525/ Z710 cell phone models. Lithium Polymer (Li-Polymer) batteries are the Lightest battery chemistry to fit your cell phone requirements. At least 50% more talk time & 50% lighter than NiMh batteries of the same size! This memory free standard capacity battery is the factory original Sony Ericsson BST-37/ DPY901526/ BKB19320311 Li-Polymer battery rated at 900 mAh capacity.Sony Ericsson BST-37/ DPY901526/ BKB19320311 battery is compatible with Sony Ericsson J220/ K750/ K750i/ W600/ W600c/ W710/ W800/ W800i/ W810i/ Z300/ Z520/ Z525/ Z710 cell phone models only. You Never need to condition your battery after the first 2-3 cycles! Charge the initial 24-hour battery charge with the cell-phone turned off.Note that a new lithium Polymer battery's full performance is only achieved after 2-3 complete charge and discharge cycles. Factory original warranty of One year applies.Supported Models and Categories:Sony-Ericsson K750i/ V600i/ W700/ W800i/ W810i Cell Phone AccessoriesSony-Ericsson Z310 Cell Phone AccessoriesSony-Ericsson Z550a/ Z550c/ Z550i Cell Phone AccessoriesSony-Ericsson J220/ J220A Cell Phone Accessories