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Gunson 1

Price: £16.99 Voltage: 6V/12V

This budget Gunson undercut every rival on price by a mile, and made clear its value for money credentials by giving 6V or 12V operation at the slide of a switch. It did well to charge when the test battery was showing only 6V. On the downside, it's heavy, has crocodile clips only, no warning lights and plugs directly to the mains. So, it's less versatile and needs to be close to the car, or used with an extension lead.

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New & used car deals

Nissan Qashqai

Nissan Qashqai

RRP £27,415Avg. savings £5,924 off RRP*Used from £12,295
Renault Clio

Renault Clio

RRP £16,160Avg. savings £2,921 off RRP*Used from £8,910
Volkswagen Polo

Volkswagen Polo

RRP £15,255Avg. savings £1,864 off RRP*Used from £6,700
Vauxhall Corsa

Vauxhall Corsa

RRP £19,200Avg. savings £4,685 off RRP*Used from £16,811
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
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