Yeah that's what I have to do with my old enegizer 2500's. with 8cells it was showing 1.3v, they are SLOWLY getting better and better. Each time they hold a higher/better charge than the last. I charge at .1amp and then use them in my radio, then charge them again at .1amp.
It's a VERY LONG process, but to me it's worth it. I guess in theory 2500mah would take 25 hours to charge at .1amp, and my Team Check Point charger has an automatic shut off if it runs too long... like 12hours or something. I'm sticking with it though.
J