ON THE WAY Rechargeable Battery 4 x 18650 (3.7V, 4000mAh,Red) LED Flashlight Torch with Charger Combo 18650 4000 mah 3.7V Li-ion rechargeable battery 100% quality control of every battery Manufactured by high power capacity products and Environmentally friendly easy to carry ,best fit for travel ,holds 85% charge over 12month period indicator light :yellow (before charge )--red (charging )--yellow (finish charge)