Beware Australian Buyers of on Screen discount vouchers on this site. Hobby King may flash a discount to purchase this item for $82.15 on the right side of the screen. The offer makes you think you are getting a discount. However they claim the price offered is in USA dollars (not Indicated) and the buyer assumes this price discount is in AU dollars. That seems logical being that you are on the Australian Website with Australian Pricing... When you go ahead with the transaction you won't see a discount at all as the Currency conversion will negate the discount.. So in Short its a SCAM to make you think you are getting a special price when in fact YOU ARE NOT!. Very Deceptive and sneaky and I have reported this to the Australian Competition and Consumer Commission as a concern. I have Provided Howard on the support desk a screen shot of the discount offer showing that it does not show the discount in USA Dollars, but he refuses to make the adjustment and apply the discount promised...
Please be aware of this should you get this offer, as you will NOT get any discount off the listed Australian Price.
I have given Hobby King the opportunity to address this problem and apply the discount, but they have chosen to send silly E-Mails that make no sense at all. I have had no choice but to report them and advise others not to fall into this trap... Real shame as I have had good purchase results from them in the past..
I bought two packs in late September. The following months have been very windy so I have only flown a couple of times. Today on the first flight with these cells for the season they balloned.
Capacity was less than 3700 mAh, despite balancing charging yesterday.
Max current 55A, they have never been emptied below 3700mAh.
nominal voltage for LiPo is 3.7V (1s), for LiFePo it's 3.2V
so on 8s it's 29.6 vs. 25.6V
biggest advantage for LiFePo is longer life IF you don't overtax them
In your scenario: 8s1p, 4.2Ah *30C constant is 25.6V x 126A = ~ 3.2kW, burst power 4,3 kW
You might get away, but for me it would be too narrow a margin.
You need to check the voltage of these pack as soon as you get them!! Two times I ordered this, four packs each time. one pack was 1v.. essentially dead, when I got it. One pack was not balanced and the other 2 were OK... same thing two times...
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Tras 3 cargas uno de los elementos ha caido, no digo que sea mala pero a mi no me ha dado un buen resultado.
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Discharged at 5, 10 , 15 and 20 amp
until 11 volts. 5 x each
charge via turnighy ACC6
Monitor with fluke meter All displayed values close enough for me.
Do not know self discharge rate yet.
Dunno how it'll go discharging at 30 C or~ 120 amp.
I'd guess the batt wire is good for 20 amp continuos,
Battery gets slightly warm to touch during 20 amp discharge or around 20 minutes to flatten.
50 amp continuos may be a big ask.
It'll be spot on for my non flying application.