Gill, this can work if individual cells in the pack are actually shorted. This is usually proven when after a charge attempt the pack voltage is down by 1.2 volts or some multiple of that.
You're correct this must be done while monitoring the pack voltage and doing it in short bursts of time. I've actually done this with less current limiting, and that may help to burn through the whiskers internally that cause the shorts, but it increases the risk of overheating. It's much better to do it on individual cells but of course on packs you can't often get at them. I think you'll find the pack will not really get back to full capacity and will probably develop more shorts in the not very far future, but heck it gives you some more capacity on the pack. Tom Fowle
