RE: Experience of using high LiPo charge rates
I have been charging my old&faithful Rhino packs already for a long time at first 1.5C and now 2C. These are the old ones, later makes were 2C charge by the manufacturer, but I don't believe they really changed anything beside the spec. These have run 250 cycles now and are still good.
I have also used 3 sets of Xcell lipos which i charged from the start with 1.5C but I never liked them much. I sold them after app. 80 cycles. They were always showing somewhat high (4-6ohm/cell) Ir.
I now run one TP 4400 25C which I charge with 11amp (the max I get out of my current power supply/charger combo). Combined with the low power usage I see on the Hacker C50 (2500-2700 per flight) my recharge time is about 20 minutes. Effectively i now only use this one battery with the old Rhino as backup. The TP is doing great and i see no adverse effects of the higher charge rates.
Volkert