Thanks guys,
The LIPOS are fairly new, unfortunately i had a cheap charger which developed a fault and spiked one cell on each battery when i tried to charge them with it (damn!). so i was hoping to salvage at least one working battery out of the 2 to save a few quid. I think i need to do alot more research before making any attempt so i'll leave things alone for the time being - seems the safest option.