Quote:
Originally Posted by NiLuJe
I would strongly advise *against* buying one, even for testing purposes, because I can't even really say that it's working as intended: it behaves... very, very, very badly; so the net effect is pretty insignificant; making it barely more useful than a very expensive cover  . |
Both this and the Oasis are so poor and expensive you are better off with 5,000mAH to 12,000mAH generic power bank.
Curiously the Oasis one is allegedly poor too.
The power banks with a solar front panel seem useless (2 each of 2 models here), at least in Ireland. Maybe outdoors in Arizona? I have an A4 folding solar panel and even it would take days to charge a power bank.
EDIT:
Some USB power banks are marked with actual USB charging capacity. Most are sneaky and mark the when new LiPoly cell capacity. The delivered charge is less as the cell is 3.3V to 4.2V during use and is converted at 75% to 90% efficiency to 5V. You need one rated at at least 1.5A for the Sage. They are usually 1A, or 2.1A or maybe even both on two sockets.