Yes, it eliminates cord wrap since the battery and all connections can be attached to the arm or base that rotates with the OTA. I think it is the way to go. Migwan has some great advice too. My battery option (talentcell) is cheaper than his, I think, but his battery is heavy duty. Mine has been more than I need, but probably need more juice than me.
I didn't realize that fix with the power port. That's good to know. The problem in my experience is finding a plug that is deep enough for it. You are right it's a real weakness in the scope.
Btw, is there a way to turn off cordwrap permanently? I turn it off after every time I align the scope. It is a minor pain for me. It would be nice to set the default to off!
Yes, that power port is definitely a weak link. Even if it doesn't cause a complete reboot on your alignment, it can throw it off due to the added resistance of a poor contact. This manifests as a gradual loss of alignment unrelated to whether a target is near the zenith or the horizon.
I dug through all my old power supplies gained over the years and found a right angle 2.1 so it doesn't get bumped as much. I also tape the wire to the deck next to the port so it doesn't get yanked on either. If I wasn't such a klutz, maybe this would not be necessary, but I don't want to mess with those wings too much. All said and done, the 1100 stays on target all night long now.
That bienno pack is only 1Ah more than your Talentcell and I have run it couple of nights without recharge in the wilderness. I bought it because it has a much flatter voltage curve and it is said to have twice the charge discharge cycles and shelf life. Considering the price I might have gone overkill. Those prices should start coming down as the number of producers goes up. The Celestron power pack now has LiFePO4 cells in them. Pretty sure Talentcells will offer them at some point. Hopefully at a better price.
I have asked the same question about turning cord wrap staying off permanently. Evidently not. If Celestron would add that to update, that would be cool.