The SuperBrain 969 can charge lead gelcel batts. It can also do li-poly I think. I have the 959. I can't do any of that and the lowest charge rate is 500 ma which is too fast to get a good charge on my hump packs. I use a cheap wall charger on my gelcel and I kinda wish I had the same for my hump packs. Cheaper. More effective.
EDIT: Peak charger is nice for the "o crap" times when you're on the track and you need to charge up quick (1000 ma). The 959 rocks for that. I love the 12v gator clips. Plug it right into my car bat.