Hi Mehdi, I also have the iExos100. I now use the Explore Scientific USB Power Bank. Its small, light weight, and fits perfectly in the iExos stock plastic battery pack holder. I power the mount, and a couple of dew heaters, and it will last at least several hours. I have been outside for 2-3 hours, and it is still around 75-80 capacity (estimated). It also has a red light that I use to illuminate the area under the mount.
Vero Beach, FL
Mounts: ES iExos 100-PMC Eight, ExploreStars iPad, Fire HD8
Scopes: ES ED80CF, ES AR102, Meade ETX 90 EC (Deforked)
Software: MacOS, Starry Sky Stacker, Affinity Photo, Lightroom, SkySafari Plus
Cameras: Nikon D600, D5500
Misc: ES USB Power Bank, Rigel QuikFinder, 0.8x Focal Reducer, Filters:
Optolong L-Pro, L-eNhance