In my Amazon basket; must reign myself in until next payday now… I note it has a permanently attached usb-C lead, which means it could only charge the grey hub. If it can charge a single grey battery (I keep wanting to say ‘grey cell’, but there are 2 in a DJI battery) in the time it takes for me to fly 2 grey and 3 black batteries, ballpark 105minutes, it will extend my potential flying time considerably, possibly enabling ‘rolling charging’ of the grey batteries, but I will have to paint numbers on the batteries or I will lose track of them…
It will be worth buying as it will also be able to charge the phone if needed, likewise headphones & RC.
It also has both type A and C ports, along with the tethered C. Not sure on the A port output but think it will probably max at 15w.
Edit : yep, 15W at 5V but can do 22.5W max.
https://support.anker.com/s/article/Anker-Zolo-Power-Bank-20K-30W-Built-In-USB-C-Cable-User-Guide-A1689
Did you actually give the poster the courtesy of LOOKING at the Amazon page? Obviously not. 
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Im not great with languages but have spent 14 years working along side Polish and Lithuanians and the odd Romanian in a factory environment. Kurwa seems to take up at least 50% of a conversation. Cant say hello in Polish but can tell them to sper dalai. Somewthing tells me you hear that one a lot too Johnster 
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To quote the bobblehead dog in the Churchill advert, ooohhh yes!.
Dzien Dobre works as ‘hello’, and since The Squeeze is Silesian and therefore has German leanings, Guten Tag does the job as well. Her favourite from me is 'Koham tzier alle sper dallei (I love you, but fuck off), which she made me repeat to her mum over the phone. Result; a 70-year-old Polish lady with zero English and who I’d never met laughing hysterically…
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To be fair to TheVerboseJohnster, none of the pictures on the Amazon listing actually show the USB-A port. I had to double check to see if it was the same version as the one I have, and it is.
Though I’ll own up and say I only scanned the Amazon entry to check the price. TBH the numbers are a bit meaninless to me, especially in an entry which describes performance in terms of phone charging when what I’m mostly interested in is drone battery charging…
For which reason ParmoPaul’s recommendation is particularly appreciated!
