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 Tiguan

Volkswagen Tiguan

RRP £38,050Avg. savings £3,394 off RRP*Used from £27,987
Renault Clio

Renault Clio

RRP £16,175Avg. savings £2,431 off RRP*Used from £7,595
Toyota Yaris Cross
Dacia Spring

Dacia Spring

RRP £14,995Avg. savings £2,785 off RRP*Used from £10,000
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

New Land Rover Defender updates suggest 'if it ain't broke...' approach
2027 Land Rover (camouflaged) - front

New Land Rover Defender updates suggest 'if it ain't broke...' approach

Land Rover isn’t fixing what isn’t broken with its hugely popular Defender
News
11 May 2026
Volkswagen T-Roc vs Toyota C-HR: two popular small SUVs, one winner
Volkswagen T-Roc and Toyota C-HR - front tracking

Volkswagen T-Roc vs Toyota C-HR: two popular small SUVs, one winner

The second-generation VW T-Roc has landed to find the Toyota C-HR waiting to challenge it. Which SUV comes out on top?
Car group tests
9 May 2026
Plug-in hybrids outpace EVs on battery degradation due to varied use patterns
Electric car charging

Plug-in hybrids outpace EVs on battery degradation due to varied use patterns

While average battery state of health is roughly the same for EVs and PHEVs, varied use cases create more variance for hybrids
News
11 May 2026