Power chair users: have you had better luck with a particular brand of battery? My current chair came with Deka brand (group 22NF) sealed gel. I charged them every 2-3 nights. When it came time to replace them, I bought Interstate batteries, and I have to charge them nightly.
One more question: Does anyone know if you can replace group 22NF's with group 24 (of similar dimensions), which has a higher amp rating? Couldn't find it on the Invacare (my chair) site.