RE: Rhino 4900
Nickolay, I have always combined my packs and charged them as 10S. Works perfect and I prefer not to break the packs, also prevents any mishap/error while connecting.
I love the 3010. If you can charge at your field, you will need only two packs instead of 3/4 since you can charge at a high C rate. I charge my 10S with 11amps so it is ready within 20 minutes. Also the 3010 balances very quickly. There is no problem balancing 10S versus 5S.
Volkert