20% off Just Mobile Gum++ portable power bank

Never let your iPhone’s battery die again!

We all know how inconvenient it can be when our iPhone’s battery runs out and, however magical the new iPhones are, that isn’t going to change soon. Happily, we’ve teamed up with Computers Unlimited to get you a discount on a terrific portable battery extender. The Just Mobile Gum++ has a 6000mAh battery inside, enough to charge your iPhone two or three times, and, with a system of LEDs, you can see how much charge the device itself has left. To get one with 20% off, go to bit.ly/GUMOFFER and then enter the claim code JSMGUM2P at the checkout. The offer’s valid from 15 September to 24 November 2014 – and it would make a perfect stocking-filler for Christmas too!