This is a 3.7V Lithium Polymer 800mAh Battery, it can apply on variety of electric devices, especially some portable devices. It has lots of protect function to keep your battery in safety. If you want to DIY something that need to charge, it is fully capable of this job.
Features
Maximum charge current: 1C
Maximum discharge current: 1C
Discharge cut-off voltage: 2.75V (+ - 0.05)
Charging cut-off voltage: 4.2V (+ -0.05)
Discharge Temperature: -20 ° C ~ + 60 ° C
Charging time: 2-5hrs (standard); 2hrs (fast)
Charge and discharge times: more than 1000 times
Protection: with over charge, over discharge, over current, short circuit protection