I bought a couple of sets and so far I really like them. Can't give you IR stats because I use LaCrosse chargers which I don't think can measure IR. But these cells are pretty powerful and tend to deliver the power evenly during discharge. I also like the fact that all 8 cells I got tend to have similar voltage and capacity. Here are the stats I do have:
They don't feel as punchy as the Orion 750SHOs, smoother powerband, but my 70turn screams full throttle with the 777s. And so far they have been much more stable than the SHOs. I discharge/charge my cells on LaCrosse chargers at 350/700 mA. I have some R1 750s which started out pretty good but have since gone flat.
Hope my description makes sense. Its kind of hard to explain how a battery performs
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