Just reading this thread as at the moment Ive no experience with lithiums as (lots with nicd and nimh though) but one thing I notice is that Novastar is always reffering to Lith-ION and the problem packs reffered to by countdown are Lith-POLY.

Maybe thats why Nova hasnt had the same problems.

Nova any chance you could list some of the places where you have bought batteries and chargers. While I might not be ble to pick stuff up from them (due to being in the UK) it would at least let me see exactly what has been used successfully and try and source a local supplier. Its one battery type I wouldnt mind having a play with.