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

Renault Clio

Renault Clio

RRP £16,175Avg. savings £2,770 off RRP*Used from £7,495
Toyota Yaris Cross
Kia Sportage

Kia Sportage

RRP £28,085Avg. savings £3,239 off RRP*Used from £13,990
Audi A3

Audi A3

RRP £26,310Avg. savings £2,572 off RRP*Used from £9,795
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

PHEV megatest: Britain's 16 favourite plug-in hybrid systems tested
PHEV Megatest headershot

PHEV megatest: Britain's 16 favourite plug-in hybrid systems tested

It’s PHEV boom time. So we tried the systems offered in 59 cars, testing their EV range and efficiency, to reveal the ones you should buy
Car group tests
14 May 2026
New Land Rover Discovery is on track as brand seeks to redefine the model in relation to Defender
Land Rover Discovery badge

New Land Rover Discovery is on track as brand seeks to redefine the model in relation to Defender

The Land Rover Discovery is set for a reboot according to JLR boss P.B Balaji
News
14 May 2026
Battery repair black hole is putting the future of EVs under threat
Technician working on EV batteries

Battery repair black hole is putting the future of EVs under threat

Experts call for end to culture of replace rather than repair amid concerns over second-hand cars
News
13 May 2026