Ask Honest John

Most recently answered battery life questions
I read an interesting article about people who charge their electric cars via solar panels or cheap rate electricity at night and then use the car battery to power their house during the day or even sell...
I recently read that the best practice for good EV battery health is only to charge to 80%. I'd be grateful for a bit more advice on this, please. Is it best to limit a charge to 80% when rapid charging,...
This is not really a question as such but I've seen your advice that car batteries are designed to last 3-5 years. I have owned a 2003 Citroen Xsara Picasso from new. I'm probably tempting fate to state...
How long do you think a battery in an electric car would last if you do an average 15,000 miles a year?
How much does it cost when an electric car battery goes bad or fails?
My stop-start engine stopped, as per normal, at a set of traffic lights - but then wouldn't automatically start again. Why's that?
Three years ago, I bought a hybrid Toyota C-HR. In the light of lockdown, we have not used it for 13 days. On trying to take it out for food shopping, it would not start and upon telephoning Toyota we...
I have a 2015 Golf 2.0 TDI that has done 35,000 miles and been serviced by Volkswagen since new. I've owned the car for 13 months. I've noticed the battery is losing its charge. It is normally driven on...
I am about to be quarantined for three months. I propose to run my car weekly. How long do I need to run it to keep the battery charged? Anything else I need to do?
My wife's Suzuki Vitara petrol is only used for occasional short trips and the battery is running low on charge. Can I charge it in situ using a standard non-smart battery charger without disconnecting...