I have stock of Eagletac 18650 3400mah and was going to get a Soshine E3
But a friend has recommended an Anker Powercore + 2100 (complete unit with batteries)
I’ll have sporadic opportunity to charge it and apparently the Anker will charge faster, is lighter (3 Cells rather than 4) and has a bigger capacity (20100mah rather than 13600mah)
I have several Anker products including an older 13000 mAh power bank. Great customer service, and an 18 month warranty on all their stuff. Needless to say, I love their power banks.
^
+1
The Anker Power Core 21000 I purchased has Panasonic cells, certainly doesn’t fill it’s tank quickly, but has long legs, and doesn’t run out of breath, even when charging an Asus convertible and Lumia phone repeatedly, at the same time.