The power bank has 88.8Wh printed on it. So it should still fit for air travel.
To get from mAh to Wh, you basically need the (internal) cell pack voltage of a powerbank, since Watt = Ampere * Volt. However, I have hardly ever seen this specified for such products. The cell voltage of a classic cobalt-based Li-ion cell is 3.6V; 3.7V are also relatively common. If you calculate back from 88.8Wh via 24Ah to the voltage, you actually get 3.7V for this powerbank (88.8Wh / 24Ah = 3.7V).
However, I wouldn't rely too much on this if you don't have more detailed information about the internal construction of the powerbank -- so to be on the safe side, ask.
Hi, I believe the recharging time according to this review (http://northernreviewer.com/sandberg-o...) should be around 10 hours. It is not the same model but its for the same brand and looks similar, just different battery capacity. I think this works completly if you are out in the wild and you can leave it outside all day and then use it overnight. You definitely not gonna get fast recharge times with the sun...
You cannot charge your laptop with this power bank as the power capacity of 88.80 Wh is not sufficient for most laptops. Laptops often require more energy to be fully charged.
Total junk, I had the powerbank with me on a Himalayan trek. Much too heavy and poor charging performance, regardless of whether it was in the sun or on the mains. I sold the PB straight away.
It's clear that this solar panel is just for a tiny top up, if it's really a proper solar recharge you're after you need the models with the fold out solar panels where you have several panels so you attach these panels to your backpack
Mine charges about one bar per day... (However, you have to switch on the powerbank to see the charge level, the charge level is shown by blue LEDs, and only one green LED lights up while I am charging. Maybe that's your problem).