How much is an MHEV battery?

I'm thinking of buying a fairly new used car. Most of them seem to have mild hybrid engines, but I haven't found information on how long these batteries last and how much they cost to replace. As I understand...

Should you put grease on battery terminals to protect from corrosion?

Should you put grease on battery terminals to protect from corrosion?

What is the battery life for cars with a stop/start function?

I have a SEAT Leon, the engine stops at traffic lights etc and restarts automatically when you are free to go. Recently the car does not restart and a message says restart manually. Is this a sign that...

Battery failure on a recently purchased used car - who is responsible?

I bought a Meriva from a Vauxhall main dealer less than three months ago, but the battery has now failed. Are they responsible for replacing it?