Having just bought a hybrid Toyota which are legend for flattening their 12 v batteries after leaving idle for a while I started tracking these in Amazon from late December. I thought I had done well at £69 a week ago! Over Christmas and early Jan they hit £92. Ive never seen “ dynamic” prices like it at Amazon before.
Interestingly Tayna ( my go to for eleccy things) were tracking the amazon price fairly accurately, as today they are £66 plus £6 delivery.