So, got back from the mag shoot and soon after one of my batteries went flat.
Very odd I thought after a long motorway run.
Charged it up, flat again, charged it up, flat AGAIN.
Hmmm, could be a drain issue I thought but could be a dead battery.
Easy option: grabbed the booster pack we have here at work and disconnected battery and connected booster pack instead, battery stayed up all day/night
So, rummaged in my brains and remembered a guy selling Optima batteries on here.
Found the thread, guy was in Leeds, great! Luckily I had a mate working in Leeds that weekend, super great!
The Optimas were more expensive than I needed to spend, could have got away with a 60 quid job to replace the dead battery but I thought I should probably take the opportunity to buy Optimas at this great price, approx half price tbh, so I ordered a Red Top for starter and Yellow Top for my main battery.
I would probably only regret it if I ever needed to replace my starter battery in future and Marc had sold all of his Optimas, whereas now I hope to have many years of huge power availability.
Here's a pic, will get some more when fitted!