These lipo batteries are useless for e-flight models.
I bought four, supposedly 30C rated, to replace my aged and failing 3S1800's of other brands that are no longer available (typical)
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So after charging at 1C, I plugged one into my YP model, (which typically gives me five minutes - take off and cruise - on an old pack) checked everything, and performed a take-off. On the climb-out, my telemetry began telling me that my battery was reading 3.2 volts per cell!
A hasty landing was performed, and the battery swapped for another - with the same result.
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Muttering certain phrases you won't find in a dictionary, I replied to Stew, who was asking what was up.
He happened to have a Toolkit RC tester that can measure internal cell resistance - with him, and said a good lipo should show around a 10 reading, or less. One of my old dodgy ones was showing about 15, but the two new Radients were both showing 50! The off-load pack voltage was in the high 11's.
So - although they are good for LOW LOAD applications, they are useless for flight packs.
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After 'resting' for approx 40 hours (doing other things), I put one on my own capacity tester - off-load - and it is showing 44% and 11.6v. so I put my discharge load (two car headlamp bulbs in series) onto it, and got readings of 30 watts/2.7 amps, and the capacity promptly collapsed to 0.4% and 10.6 volts.
Conclusion - don't touch them with a barge-pole!
if you are calm and collected when all about you are going berserk - you've missed something important!
