Thanks for your reply that sounds the same as the Q500 4K battery which is also understated capacity of 5400 mah but is more like 6200 mah, as I use The iCharger 208B along with a modified psu which I can parallel charge 3 x 3s 5400mah yuneec batteries together at 5.4
[email protected], so when I receive my typhoon H my first job will be modifying the standard charger the same as yours,but until someone comes out with a suitable connectors I guess its going to be single battery charge for the time being, I forgot to ask what sort of charge time are you getting to full charge and are you setting the charge to 5.4 amps or going a bit higher to allow for understated capacity.
You mention battery seems warmer than what you are used to, my own experience with my so called modified phantom 1.5 that also get quite warm when down to 10.7 to 10.6 volts that's with DJI batteries and Chinese knock off batts in fact the Chinese battery's which was half the price give longer flight times.
My Q500 4K battery's also get quite warm when run down to 10.7 to 10.6 volts, so I guess its normal for these types of battery's to be warm when down to a minimum discharged state.