This battery model is now part of the Odyssey series and was previously called an Extreme 30 and for a while was rebranded in the UK as a Spark or Varley Red Top. Now called PC950.
Batteries have seen success for over 30 years in Formula 5000 as Varley RedTops before Varley changed to a cheap Chinese pseudo equivalent. Used in single seater racing throughout Europe.
A great upgrade over the PC680 as it's only 2Kg heavier but with twice the Ah (which is reserve power). Think of it as a larger tank of gas to start your car over and over again. Also faster recovery to almost 12.8v after cranking.
34Ah @ 20hr rate - that's 1.7A for 20 hours until the battery voltage is 10.5V
32Ah @ 10hr rate - that's 3.2A for 10 hours until the battery voltage is 10.5V
Reserve Capacity 60 minutes at 25A discharge
M6 studs are non-removable