Those batteries work well I got mine off ebay for $20 6800 Mah the scope lasts all night long and the mx2 with the Orion Teletrack share one and last all night as well so Thumbs up for the batteries I have had them for we'll over a year and work and charge well I never have run them flat and left the scope on and the dolly setup out the back and still and plenty of juice left over in the morning.
