Halfords 131253

Price: £15 Contact: 0845 762 6625, www.halfords.com Max 12V output: 10 Amps Rating: ★★★★★

BEST BUY THIS Halfords unit is one of the easiest here to position and secure; it’s designed to sit in a cup-holder and comes with a coiled lead that stretches out to a metre. We liked the generous 10 Amp maximum current, the battery-level monitor and the plug’s securing ring that prevents accidental power loss. Our only gripe is that the USB ports are limited to one Amp each.