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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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Volkswagen Golf

Volkswagen Golf

RRP £24,625Avg. savings £2,795 off RRP*Used from £11,895
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Audi A3

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Skoda Kodiaq

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* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
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