High capa city power banks

Keep your ph one or table t al ive for an absolute age

RAVPower 26800mAh Power Bank

The Power Bank has three USB ports outputting up to 5.5V and enough juice to fill an iPhone 6 up to 10 times. It even works out the power your devices require and sets its output to match. £35.99, ravpower.com

Omnicharge Omni 20

The 20,040mAh battery has enough output heft to charge phones, tablets and laptops on the go, with AC/DC power output and an OLED screen to monitor what’s going on. High-end, with a price to match, but potentially worth it. $299 (£238), omnicharge.co

Zendure A8

If you have a box packed with high-capacity lithium-ion batteries in your bag, you don’t want them getting pierced. This 26,800mAh four-port monster, which refills in as little as eight hours thanks to quick-charge tech, is crush-proof and hardy. £99.99, zendure.com