Totoab 15000mAH DC 5V/9V/12V USB High Capacity Rechargeable Li-ion Battery Pack Charger Perfect for building 12V, 9V, or 5V battery pack for CCD cameras, CMOS cameras, RC toy, robots, laptopand DVD external battery etc. High quality All-In-One (12V, 9V, 5V) Li-Ion rechargeable battery pack Light weight and higher energy density than any rechargeable battery No memory effect and rechargeable Longer storage life than NiMH battery Built-in IC chip will prevent battery pack from over charge and over discharge and prolongs battery life