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Your motors, etc will only pull so many and no increase of the C rating makes any difference, the motors, etc only pull what they need. I have 25C rated batteries, so your not gaining much by going higher, the price and difference it will make is not worth paying the extra, the Phantom uses 20C mini. I have 25C so can have it running flatout, etc and will supply all it needs
The biggest killer of these batteries is not looking after them properly. And the worse thing you can do is leave them overnight fully charged, it kills them quicker. No extra C rating helps if you don't look after your batteries.
The have to be charged the day you use them, the longer the charge remains without use the more damage, and left overnight fully charged will certianly shorten their life, which is why a good charger has a storage charge, so you can safely store these batteries, a fully charged battery left is a NO NO!!!!!!!!!!!
You can buy a higher C battery, but the lttle benefit you will gain is not worth spending the extra on and are heavier, so the gains may not be worth it. 25C run well on the Phantom and not hot at all. Higher C rated batteries bring heavier may give less fly time due to weight.
So while the higher C rating your battery may last longer, the weight increases also, so less flight time, motors may work harder to carry the extra weight, so in the end, you may not gain much, unless you find a battery with higher C rating and lighter weight, but generally higher C rating heaver battery, so you may gain little advantage in the end and the Phantom will no pull enough to make your batteries that hot you need higher capacity. maybe on Manual mode a higher C rating will help as the Phantom becomes a different beast, and can push it much harder then the Stanadard Phantom, but with GPS and all autos on, you won't be pushing the battery.
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