Originally Posted by
DrunkCargo
Is this the case with quickcharge and USB-C variants?
QC2.0 and USB3.1 can both use voltages higher than 5V, but generally a "10,000 mAh" battery is 10,000 mAh @ 5V regardless of whether it supports 9V or 12V charging. In fact the actual Wh capacity will be even less than 10 Ah * 5 V because it won't be able to supply rated voltage towards the end of the discharge cycle.
For example, Anker PowerCore+ 10050:
Capacity: 10500 mAh / 36.18 Wh
Output: 5V / 2.4A, 9V / 2A, 12V / 1.5A
Note that 36.18 Wh < 10500 mAh * 5V.
Originally Posted by
segacs
I have a small USB battery pack (10000 mAh) that I use as a backup charger for my devices. I researched it before I bought it and airline regulations say that it's allowed on board, as long as I carry it in my carry-on luggage and not my checked luggage. I've never had problems taking it on flights since I purchased it. It's a lifesaver since there are rarely any power ports in economy class.
(It's also really useful during travel, on long bus rides, train rides, in hostel dorm rooms with limited outlets, or in countries with intermittent electricity.)
I completely agree.