Sakura A035

The Sakura A035 lets you charge five gadgets at a time, with its three 12V sockets and two USBs – the most power inputs here.

As with the A034, this massive adapter comes with a sticky pad for in-car mounting. It’s cheaper than the Ring RMS15, at less than £10, although it’s not built to the same high standard – our sat-nav’s 12V plug wobbled around in the Sakura’s ports.

Plus, like the A034, there’s only one light saying power is available, instead of individual lights to tell you which 12V sockets are in use.

Still, the USBs charged our iPod and there is a useful number of 12V inputs.