Had to replace the pc680, as it was not holding a charge anymore (4 years of fooling around with the car, and two weeks' driving). The battery shop recommended going to the much bigger, and more expensive pc925, which I did. Now I am seeing just how small and convenient the old one was. Was the pc925 a waste of extra money?

[Edited on 6/1/12 by RK]

Not a waste of money as you have an excellent battery that will more than cope with your needs. I have a PC545 which is fine after three and half years on a tuned zetec. But I do 5000+ all year round which probably keeps the battery healthy. You probably didn't need the bigger battery, just to use it or keep it on a conditioner.

[Edited on 6/1/12 by Dusty]

The pc680 is plenty. Mine used to start an old xflow now starts a 2.0l Vauxhall no problem. With these batteries you need a battery charger/conditioner if it's laid up for any length of time because they don't like being left flat/low charge.