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Old Jan 10, 2016, 01:19 PM
Ken Myers is offline
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Commerce Township, MI
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Thank you Wayne.

That may have been my post in a different thread, sorry for the repetition, but I'd not done as many packs at that time, and didn't notice what appeared to be a pattern, but I'll take your word that it just might be coincidental.

Thanks for taking the time to respond.

Ken
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Old Jan 10, 2016, 02:23 PM
Wayne Giles is offline
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Quote:
Originally Posted by hethjo View Post
Thanks Chuck, John and Wayne.

Why I wanted confirmation, is I measured at 21.8 degrees, a Gens Ace 1300mA 25C at 9.24, 9.72 and 9.52 and a Tattu 1300mA 45C at 9.64, 10.00 and 9.48. That say to me that the C rating for both are essentially the same, even though the Tattu is supposed to be 45C.

These are brand new batteries, not used at all.

I curious, has anyone seen a 3S 5000mA that lives up to its C rating? I bought a 25C and measured only 18C.

Hennie
Hennie,

It could be that the GensAce and the Tattu are the same cells; you never know in the lipo world. The figures are pretty good and they should drop a little after the first few cycles.

Re the 5000mAh question, I bought 4 off 5000 3S 20C Turnigy Blue packs about 3 years ago to use on an electric bike and now use them to drive the test and calibration rig for the ESR Meter. I have been using one pack for well over 2 years and I agree that it did not get a hard life on the bike @ about 5C - 8C discharges but it has always shown extremely well on the meter ratings.
I put it in a temperate controlled enclosure today @25*C and soaked it for a couple of hours and then put it on an ESR Analysis meter and Cell Mode results are:-

2.32m.ohms 23C
2.40m.ohms 22C
2.28m.ohms 23C
2.28m.ohms 23C
2.28m.ohms 23C
2.32m.ohms 23C

I reckon that is pretty impressive for a 3 year old, admittedly lightly used, 20C rated pack bearing in mind that the Lipotool calculator is pretty conservative.

I know the pack off by heart and that slightly weaker cell 2 is a good test to ensure that the meter on test always picks it out.

If you can accept HK's customer "service", then Turnigy Blue lipos have been a good bet over the years. Having said that they could have just changed the cell supplier, but who knows in the Lipo Lottery world.

Wayne
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