Specifications Bundle:Bundle 1 Battery Number:2pcs/ 4pcs/ 6pcs/ 8pcs/ 10pcs Size:16340 Replacement Battery:Yes Set Type:Batteries Only Type:Li-Ion Nominal Capacity:2000mAh Model Number:BLUE 16340 Certification:CE Capacity:2000mAh Rated Voltage:3.7V Rechargeable:>550 cycles, theoretically Chemistry:Li-ion Color:Blue Size(HxD):3.4x1.6cm/1.34x0.63" use for 1:Mobile Power Pack/ Power bank/ MPP/ laptop/ Wireless data transmitter use for 2:Portable instrumentation/ Portable lighting equipment/ Toys 16340 Battery 3.7V 2000mAh Lithium Rechargeable Li-ion Cell (Replace for CR123A, CR17345, K123A, VL123A, DL123A, 5018LC, SF123A and EL123AP Specifications Model:16340 Capacity: 2000mAh Rated Voltage: 3.7V Chemistry: Li-ion Net Weight: About 14g/pc Size(HxD): 3.4x1.6cm/1.34x0.63" Features Stable discharge rate, no''memory effect''. Low re-occurring operation cist, short-circuit and over-current protection. Safe and environmental friendly,high energy density +extreme long charging circles, great for long term daily use. High energy density, and have an extra long life for all your battery powered devices. Provides excellent continuous power source solutions to your devices. Widely used on torch, power bank, microphone, radio, gamepad,laser pointer, LED flashlight,headlamp,camera, toy, remote control, mini fan, portable printer, emergency light, interphone, portable DVD, instrument, audio equipment, aerial model, and other electronic devices that need 16340 cells.