anker battery pack
On Amazon, take your pick.
How good are they then? Or is it a wind up..?
Good high capacity powerbanks are cheap these days so would go with that. On trips have charged the phone from the bike and then stuck the powerbank on to charge also.
I realise it's a 1st world problem and that I'm showing my age but am also pretty sure some of you modern young bucks will have the know how.
I use one of these; i've had it a few years now and it goes everywhere with me ; work rest or play; although there's not much play at the mo;. Just taken it out of my bag now; and there's still 4 lights on.
It’s a shame you don’t let your wife charge her eTab off it