iPhone_iXpand photo drive: iPhone batteries dying_hope this'd help :)
I initially went on here to see what people'd do because my iphone battery was on 17% and the transfer (still) is nowhere near finishing ... then I realised I have a portable magnet charger so I guess problem solved for now, .. until that runs out (hopefully won't)! But yeh, the iXpand Photo Drive DEFINITELY eats up loads of battery! and fast! Handy though when a laptop isn't nearby ... I tried buying more storage on iCloud initially too and in fact I did, but had problems transferring videos - super sloooooooooow!