This looks interesting

[perlionsmitnick]

pretty nice looking specs on this box. 3.6V 5V 3A 6-24V 2A 18650 Mobile Battery Box Charger FR Tablet PC Laptop Router | eBay

Charging input:
16.8v 4 series lithium battery charger

Output:

USB port：
3.6V, 5V - 3A (MAX);
6V, 9V, 12V ---- 2A (MAX).

5.5 * 2.1mmDC socket:
15V, 16V, 19V, 21V, 24V --- 2A (MAX).

Technical Data: 4 18650 lithium battery, voltage 3.6V/3.7V

Charging port: 3.5 * 1.3mm dc Block

 

[asdaq]

The parameters are in the vaping range, that is going for this. However it is big, and uses a thin casing and things don't line up right from the board to the case holes, like the switches and LEDs. Even for charging a laptop I'd be worried about using it. I really could use a meter too.