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

Vauxhall Corsa

Vauxhall Corsa

RRP £19,705Avg. savings £6,173 off RRP*Used from £8,845
Dacia Spring

Dacia Spring

RRP £11,990Avg. savings £586 off RRP*Used from £9,000
Skoda Kodiaq

Skoda Kodiaq

RRP £39,045Avg. savings £4,673 off RRP*Used from £12,390
Volkswagen Tiguan

Volkswagen Tiguan

RRP £38,050Avg. savings £3,270 off RRP*Used from £24,991
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Used Toyota bZ4X (Mk1, 2021-date) buyer’s guide: EV is a second-hand bargain
Used Toyota bZ4X - front

Used Toyota bZ4X (Mk1, 2021-date) buyer’s guide: EV is a second-hand bargain

A full used buyer's guide on the Toyota bZ4X that has been on sale in the UK since 2021
Used car tests
12 Jul 2026
Huge EV pay-per-mile tax details revealed: GPS tracking and price increases confirmed
HM Treasury sign

Huge EV pay-per-mile tax details revealed: GPS tracking and price increases confirmed

In its response to the consultation on eVED, the Government says its plans will “support a fair and sustainable motoring tax system”
News
14 Jul 2026
Car Deal of the Day: Mighty Audi RS 3 hyper hatch for only £425 a month
Audi RS 3 Sportback - front action

Car Deal of the Day: Mighty Audi RS 3 hyper hatch for only £425 a month

The RS 3 is a rare breed thanks to its fire-breathing five-pot, and our Deal of the Day for 11 July keeps it affordable
News
11 Jul 2026