Assuming
they're not being deliberately misleading and are quoting the efficiency at 100 cycles because that's what they've tested (rather than because, say, it drops off a cliff at 101 cycles) I'd suspect that at 1000 cycles it's still pretty good. (99% efficiency is good for any technology - 99.9% is better.) But as always with these new battery technologies it's wait and see.
Biting the hand that feeds IT
