Ask Honest John

Most recently answered battery life questions
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...
I have an Exide Premium 030 75AH battery fitted to a 1999 Lexus LS400. I need to know what battery chargers are most suitable to maintain good battery condition. I only do short journeys so I need a reliable...
I have a 2014 Toyota Auris Hybrid. When can I expect to start having expensive repairs such as a replacement battery?
What is the expected life span of current batteries used in hybrid cars? And what is the cost of a replacement?
What type of stop/start battery is fitted to my Mercedes B-Class and why has it failed? The car is less than three years old and the mileage is 28000.
I am selling my Audi A4 Allroad 3.0 TDI and am trying to decide upon either a hybrid or EV. Is there any data available on the rate of decline in performance of EV vehicle batteries? I note Hyundai and...
I am becoming more interested in purchasing an electric car and at the age of 72 and a low mileage driver want it to last a long time. I imagine that the battery in an electric car is a lot different from...
My Outlander PHEV is three years old and has been an excellent car. I'm just starting to have a nag at the back of my mind about battery life and the consequent cost of replacement. Could I have your views...
What is the best way to maintain PHEV batteries and enable them to keep their charge?
 

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