oem long life time replaceable 900mah| Alibaba.com
Sony Ericsson BST-37 Replacement Li-Polymer Battery 3.6V 900mAh W350 W810i W800i | eBay
Sony Ericsson W810i Satin Black 20MB ROM Gsm Unlocked Phone DISPLAY 1.90-Inches (176x220) FRONT CAMERA - REAR CAMERA 2MP STORAGE 20MB BATTERY CAPACITY 900mAh WEIGHT 79g (2.79 oz)
Sony Ericsson - W810 Battery | Complete Battery Source