LOREX Brand New Battery Pack Wireless Cameras High-Capacity 4 Cell Battery Pack for LWB3801 Wire-Free Cameras (4-pack) Long lasting lithium-ion technology On the inside of each of your Power Packs are four high-powered lithium-ion batteries. These are the same type of batteries that power laptops, cell-phones, and even electric cars. They can be recharged hundreds of times, and do not need to be fully depleted before charging them. Easy to charge An LED light on the side of the Power Pack will turn on as it charges. This LED will turn from red to green to indicate when the battery is full. When it is fully charged, simply remove the low Power Pack from the base of the camera and insert the fully charged one. The quick release function of these Power Packs allows you to do this without having to take your camera down from its mount. 4-cell Power Pack Long-lasting battery and convenience Power Pack system makes replacing rechargeable batteries quick and simple1 Get up to 6-8 months of battery life without having to recharge the Power Pack.