This little unit has been powering my NexStar 8SE and my Ioptron MiniTower Pro for the last 6 years without a problem. It is capable of powering these mounts for many nights.
I leave the battery permanently attached to the battery charger (with trickle charge option to maintain charge levels) when not in use - important to maintain battery health.
The slightly smaller 7AH batteries would also be quite adequate IMHO.
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