This is mobile phone battery of Samsung D-828
1)battery Standard Voltage: 3.7V,
2)battery Guarantee time: 1 year
3)battery Normal capacity: 2100mAh
4)battery Cell chemistry PCM: Li-ion battery
5)Double IC and NTC PCB offer over-Discharging, over-charging, over-current and short-circuit protection
6)Battery charging time: Approx. 5 hours
7)Applicability: Samsung D820/D828/E239/P300/P308/Z510/Z518/V740/P308/D820C/D828E 
8)Origin: China