ON THE WAY&reg;4Pcs AA Sized 14500 PROTECTED 2000mAh Lithium 3.7V Li-ion Batteries with a NIPPLE End with Charger for Battery Pack for RC Toys 4x ON THE WAY14500 2000mAh Rechargeable Li-Ion Power Battery Cell Will work in any device that uses 3.7v 14500 batteries including high lumen flashlights. 14500 protected batteries with 4.2 volts max voltage and 3.7 volts nominal voltage. No memory effect and longer storage life than NiMH Batteries, can be recharged and discharged anytime. Perfect for flashlight/photo camera/headlamps/laptop/electric toys/industrial instruments,etc.