Jim, the Turn -Tech batteries are Lithium IRON Phosphate, not Polymer Lithium ION (Li-Po) - BIG difference! Lithium Iron are very user friendly and can be charged with just about any standard charger like you say. Got it. So I wonder what might make one better than the other, other than the fact that the Li-Iron are easy to deal with. Why not just go that route rather than Li-Po? Glad to hear the Graves CDI wasn't fried!