Pros: Huge capacity for the size/weight. For the few things I need to use it with, it doesn't add much size, but they will run a very long time.

Can provide a wide range of voltages.

Charges reasonably quickly for the capacity, and indication is clear.

Wide range of adaptors.

Cons: DESPITE PICTURE, DOES NOT INCLUDE CHARGER.

At least mine didn't, and the internal document explaining how to use it didn't show it. 18v is unusual, but I had a car charger from a different source that did 18v and worked fine.

Voltages are not precise (except the USB connector, though I haven't checked it). This is not normally a problem for external charger replacement where a 10% error is normal, or for automotive (12-20v) where most things have to be rated for deep drops during crank to overcharging, or for batteries that discharge and lose voltage. But if you have something that needs a precise voltage (e.g. 14.5 to 15.5) this won't do it.

Capacity left is unclear.

Adapters require an extension cable that is stiff and thick so occupies a lot of space - so this small battery pack and the router it usually powers take less space than the cable connecting them.

Other Thoughts: I would rate it higher if it included the AC adapter as pictured here (but not in the accompanying documentation). Even higher if it also had a car adapter. It also doesn't give a range around 18v/750ma so I don't know if my 19.5v laptop adapter would be safe, or if my 16.5v would work.

The "voltage range" typically will mean, except for 5v (usb) devices, that it will be pack->adapter->device instead of pack->device. I don't know how they could keep it small yet allow finer setting of the voltage, but that is the only real technical complaint I have with it.

Bottomline: As a USB charger, (if you have an 18v power supply available) I don't think there is any better pack for the money (under $10/1Ah). And the capacity is enough to run things for hours. They should include the recharger.