Ask Honest John

Most recently answered batteries questions
I just changed my alternator because it wasn't charging my battery. The problem is my battery light is still on, check battery showing healthy 12.5v it is the right battery. The alternator charges it at...
I own a Mitsubishi Outlander PHEV new March 30th 2015. The battery life is fading, and has reduced from 32 to less than 20 miles in 4 months. Is this a common problem? Should Mitsubishi replace the batteries?...
How long do you think the battery on a Mercedes C-Class should last? I've just had to have a second new one fitted (3 months outside warranty) Each one has lasted 18 months roughly. Mercedes refused...
The battery light has come on my dashboard, then when driving the car the handbrake light also came on (obviously the handbrake is off), then the odometer showed ---- and the speedometer wouldn't move...
The stop-start, function on my two year old Mercedes-Benz SL350 AMG seems to work on a completely random basis. Some days it becomes operative after a journey of a mile while on others it will refuse to...
My 2004 Jaguar S-Type diesel has a battery warning light on all the time on the dash. I've fitted a new battery, but the light hasn't gone off. Any ideas?
Does leaving a USB stick connected and/or a phone charger discharge the battery? My wife's Honda CR- has just done a 100 mile journey, yet a few days later the battery was dead. Has the USB stick done...
Our Peugeot 307 (2007 registration) suffers from a flat battery in the mornings. I've tried buying a new battery, but they have also gone flat. The car has been looked at by our garage a couple of times...
I purchased a brand new Ford Fiesta in August 2014. The car stopped working in December and the AA identified an issue with the battery. The car was checked into the dealer for repair under warranty and...
I have a new Honda CR-V, with 5000 miles on the clock. Is it normal for the stop-start not to work and the low battery sign to come on?
 

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 12% on GAP Insurance

Use HJ21 to save on an ALA policy

See offer