Lion battery - 15 months old - car won't even turn over (no "click": nothing) so I replaced it with a hugely expensive and very lovely new Yuasa HSB010 via Halfords today. Fully charged and ready to go...... except I have exactly the same thing: the car will not even try to turn over. With the old Lion battery it was possible to boost-start it (and, yes, the alternator is charging the battery) but I don't see the logic in 'boosting' a new battery.
Any thoughts please? The old battery, because I considered it suspect, had been on a trickle-charger just to maintain it. Somewhat flummoxed.