Skip advert
Advertisement

Battery conditioners

If you have a second car that rarely gets used, a trickle charger is ideal for maintaining the battery's power. We put six to the test

Flat batteries are the bane of owning a classic car or infrequently used second motor. Leave the vehicle idle for a few weeks, and just when you need it there's the dreaded click as you turn the key.

The solution is to keep the battery topped up with a trickle charger, ensuring immobilisers and the like won't run it down while the car sits in the garage. There's a wide choice on the market, but which leads the charge for top honours?

Verdict

At £50, the CTEK 36 is the most expensive product on test, but it combines three charging modes in a unit that can work as a reviver and a conditioner.
The Accumate and Airflow performed well, with the former narrowly securing second position - although these chargers are more geared to conditioning only.

Skip advert
Advertisement

New & used car deals

Volkswagen Polo

Volkswagen Polo

RRP £14,480Avg. savings £1,912 off RRP*Used from £7,299
Skoda Kodiaq

Skoda Kodiaq

RRP £39,025Avg. savings £3,517 off RRP*Used from £9,690
Toyota Yaris Cross

Toyota Yaris Cross

RRP £27,245Avg. savings £2,532 off RRP*Used from £15,726
Audi A3

Audi A3

RRP £26,295Avg. savings £4,213 off RRP*Used from £10,995
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

New 2028 Ford Fiesta: all the details on iconic supermini’s sensational comeback
Ford Fiesta render Avarvarii

New 2028 Ford Fiesta: all the details on iconic supermini’s sensational comeback

The new Ford Fiesta would get all-electric power and our exclusive image previews how it could look
News
12 Feb 2026
Future of Cupra revealed: Raval hatch, facelifted Born and flagship SUV incoming
Cupra Raval concept

Future of Cupra revealed: Raval hatch, facelifted Born and flagship SUV incoming

We exclusively talk to CEO Markus Haupt about his upcoming electric cars – and the conditions needed to make them sell
News
13 Feb 2026
Cold weather range no problem for Kia’s baby: new EV2 drops less than 25% at -20 degrees
Kia EV2 front angled

Cold weather range no problem for Kia’s baby: new EV2 drops less than 25% at -20 degrees

Kia’s upcoming baby electric car came within 25 per cent of its WLTP range figure in sub-zero tests in Norway
News
13 Feb 2026