This is mobile phone battery of Sony Ericsson BST-37.
1)battery Color: Black,
2)battery Standard Voltage: 3.7V,
3)battery Guarantee time: 1 year
4)battery Normal capacity: 750mAh
5)battery Cell chemisty PCM: Li-ion battery
6)Double IC and NTC PCB offer over-Discharging, over-charging, over-current and short-circuitprotection
7)Safety and stable: Hi-tech lithium-ion Battery, undergoes drop test, smash test and acupuncture testto ensure no fire and explosion in breaking
8)Battery charging time: Approx. 5 hours
9)Models: For Sonyericsson W810