ON THE WAY&reg;6x 14500 2000mAh 3.7V Protected Rechargeable Li-ion Batteries Cells AA Size + 1x Dual Channel 14500 Battery Charger Pretty Much Exclusively for Flashlights ON THE WAY6Pcs Rechargeable 3.7v 2000 mAh 14500 Li-ion Batteries with 1 Smart Charger and Touch Pen Application for telecommunications: cellular phone, interphone, bluetooth earphone. Low impedance,higher energy density and lower weight than other types of rechargeable batteries. Internal PCB protects against under and over charging - low voltage 2.8V, high voltage 4.2V. High capacity, high performance, long work time and cycle lifespan.