Groov-e Power Pack

2 Any battery pack that claims to charge your iPhone four to six times over is bound to turn heads, and the Groov-e makes just such a bold promise. Unfortunately, it can’t live up to it – it charged our iPhone 6 Plus less than 1.5 times on the 2.4 Amp port before dying (curiously, the 1 Amp port provided just over 2.5 charges). It’s roughly the size of a 6 Plus, so isn’t the most pocketfriendly power pack, and you’ll also need to supply your own Lightning cable. Shop around, because there are more portable, powerful options out there. Alex Blake

Fails to live up to its ambitious claims on charging life; look elsewhere for your mobile charging solutions.