Weltool 16650 Protected Lithium Rechargeable Battery Build-in USB Port Adopt 2500mAh 3.7V Japanese UR16650ZTA core as Replacement for 2 CR123A

Weltool UB serie's batteries revolutionize from the traditional li-ion battery protection circuit design, placing the protection circuit with the battery core at the anode (positive terminal), combined with the steel outer shell, effectively preventing the danger from impact, such as short circuiting, without increasing the diameter of the battery. Anode protection circuit includes the Micro-USB charging port, enabling direct charging using USB cables connected to a 5V adapter, a PC USB port, or any portable power banks. UB16-25 can also be charged from a compatible lithium battery charger. While it is being charged, the indicator lamps on the battery will display the charging status. The UB16-25 battery is the same size as 2 pcs of CR123A from end to end. Some devices which use 2 CR123A batteries in series, (flashlight, headlamp, etc.) can use 1 x UB16-25 battery instead of 2 pcs of CR123A batteries. This requires the device to have the correct input voltage range, specifically a Max voltage ?6V and a Min voltage ?3V. The UB16-25 has a capacity 53% greater than 2 pcs of CR123A batteries in series and an increase in runtime. The UB16-25 can be recharged after each use, eliminating frequent purchases of single-use CR123A batteries, lowering operating cost and protecting the environment. Core's Capacity: (typ.) 2380mAh-2500mAh, (rated) 2330 mAh Measured Discharge Capacity of UB16-25 Battery: