The 450+ HP engine of a Diablo
is requires a good battery to crank the car. It is quite common in a
failing battery to still have strong lights, radio etc. and yet the battery
cannot even get the starter to crank the engine once. A good battery is essential.
Replacing a Diablo battery is not as
simple as replacing the battery on your typical US car. This is because
Lamborghini placed the battery low to the ground in front of the left rear wheel
in a Diablo. This article describes the process in switching an old
battery with a new one. I use Optima Redtop batteries. They are more expensive
but are very reliable, maintenance free, hold a charge well and have extra power to delivery crank
amps to the starter motor. The latter becomes real important in cold
weather when the EMF voltage of a lead acid battery may be only 8-9 volts.
The Redtop Optima is rated at 980 CCA see fig 6 below. The pictures below outline the process.