ON The Way 4x18650 Rechargeable Flashlight Torch Li-ion Battery for LED Flashlight Torch (3.7V, 5000mAh,Yellow)+18650Black Flashlight Battery Charger Combo New 18650 battery 18650 5000 mah 3.7V Li-ion rechargeable battery Manufactured by high power capacity products and Environmentally friendly indicator light :yellow (before charge )--red (charging )--yellow (finish charge) easy to carry ,best fit for travel ,holds 85% charge over 12month period