Beston CR123A 3.7v 700mAh 2600mWh Li Ion Micro USB Rechargeable Batteries x 2

This High Density Beston CR123A 3.7v 700mAh Rechargeable battery from boasts a 2000 times cycle. With a low self-discharge, it can give upto10 years of service. Suitable for many applications, such as wireless alarm systems, smoke detectors and range finders.