Excerpt: Bought this because I bought the Celestron Nexstar 5 SE. It charges in less than a day, it provides the needed power to drive the telescope mount motor, and is not overly heavy or cumbersome. It includes a car lighter charger which doubles to power the telescope. My version is not as pictured, it has USB charging ports instead of the pictured ports -- I find this much more useful.
Pros: Easy To Use, Strong Construction, Widely Compatible Adapter