Can I pick your esteemed brains ? We have a G30 five series diesel, now 3 years old l and an F48 petrol X1 , just over 2years old. Both obviously have stop /start fitted. Owing to the current situation both are currently "parked up" and seeing very little use, one in the garage and one on the drive, and they might be there for some time. I'm seriously considering getting a Ctek trickle charger and using it to try and keep the batteries in decent condition. Couple of questions 1) which model would you recommend, both cars are still on the original batteries, and I will be using the under bonnet charging points ? The Ctek website suggests the CT5 but reading through older threads some of you use different variations 2) how long does it take "roughly" to recharge a battery, hours, days, a week ? ... 3) anything else I need to be aware of ? Many thanks chaps n chapesses !