Package invldues: 12V 5000mAh battery pack*1, 12V charger*1, DC5521 male connector cable*1, cable connector*1. | With BMS: Built-in protection board, to prevent battery from over-charge, over-discharge, over-voltage and short-circuit. Each battery pack is build with premium grade A batteries to supply your devices powerful energy. | Battery Compatible with: Wireless Cameras, Personal Processing Systems, PDA Personal Data Assistants, Personal Communication Systems, Walkie-Talkies, Digital Cameras, Camcorders, Video Cameras, Bluetooth devices, CD Players, MD players, Portable DVDs, MP3 Players, Smart Cards, Aviation Models, LED Strip, CCTV Camera, Electronic Piano, Optical Network Unit, Router, Small Bluetooth Amp, Electric scooter 12V turn signals, Car DVR | Long life: this 12V battery pack is build with lithium-ion battery, no memory effect, can charge-discharge over 1000cycles. | We provide 12 months product guarranty. Please contact with us for customer support if you have any question about the product.