practical travel ... but very slow to load

The large capacity and 3 USB ports can charge various devices which we know do without moving ... The downside is that battery is very slow to load (about ten hours with a standard phone charger or another) even on 220v.

Tested with a solar charger of the same brand (solar 8W): This is a fiasco.

EDIT: after discussion with the service it seems that this battery requires minimal amperage to load; They say it takes 2A which would explain why it does not work well with their solar charger 8W ... yet it loads fine (slowly, but enough) with a USB charger delivering 1A or less ... weird .. .