Use the iOptron 4400mAh Lithium-Ion Battery as a replacement or a spare to keep your AZ Mount Pro mount operating at peak performance. This battery is identical to the one that originally shipped installed in the mount, with six 18650 batteries bundled together to produce 4400mAh capacity. It features over-charge/over-discharge protection thanks to its built-in IC chip, and since it suffers from no memory effect it can be recharged at any point in the discharge cycle and features a longer storage life than Ni-MH batteries.