I have a couple of packets of Sanyo HR-3u AA's, that I have put in a draw and forgotten about. Came across them today and thought I'd better charge them up. Tested the voltage at about 0.90 for all of them. The charger seems to be charging them OK. But have I damaged them by letting them discharge so low, or can a "refresh" on the charger get them back to life? Thanks for any thoughts.