LingsFire&reg; 4Pcs 3.7V 18650 3000mAh Protected Li-ion Rechargeable Battery for LED light Headlight Flashlight Torch and 18650 Double-channel Charger Large capacity and high quality 18650 3000 mAh 3.7V Li-ion Rechargeable Battery. With overcharge / discharge protection function that you can use it without worry.This 18650 battery is compatible with various kind of flashlight and LED headlamps, bike lights. This battery has an extra long life and provides excellent continuous power sources for your device.The battery case helps protect your batteries from accidental shock and clean. Please complain to Amazon if the products you received is different from the pictures because you bought a fake products.