There's been some chit chat with regards to GearBest shipping methods very recently, on this necroed thread: Quickest and most reliable Gearbest shipping method right now: America Line / IB (#36 and on)
With regards to the batteries:
Of course, Mooch hasn't tested yet our star, the LiitoKala 26650-50A/B. What makes this cell so special is that its power delivery/discharge rating is reported to be comparable to those 23As, while delivering actual higher capacity and, on top of that, being the cheapest quality 26650 on the market. 
Until now, no 26650 cell rated above 5Ah delivers decent/high power output. The known manufacturer of the 26650-50As (PLB) lists a 5500mAh model in their related portfolio, yet the specs seem to be the same as the 5000mAh model, so my guess is that the “55A” is still under development.
Cheers ^:)