Based on the first post, I am assuming that you are giving this a pretty good work out. Other makes may not be much different. The 1.25Ah is a small battery, but that also helps to keep the overall weight of the tool down. How quick is the recharge? Probably about 15 minutes. You bought the tool reconditioned; did you get a battery with it, or do you only have the one new one. If you have 2, you should be able to rotate them and not have much down-time.
It's not ideal to be constantly needing to have a battery on the charger, but I'm not sure other makes would be any different under the same use unless their batteries are bigger.
Don't know how much truth there is in it, but if you look for another impact, you might want to stick with NiCd batteries if you can rather than go to the Li type. You can draw more current from a NiCd battery than from a Li battery, and if the impact is in constant use, the Li battery can shut down because you are trying to draw too much current from it. It quickly resets itself, but could be annoying. I only use NiCds in my impact, so this is not from experience.