Ive been using a variety of chargers to keep my motley collection of vehicles in 'Volts' (and amps), But being naturally 'close' (tight, cautious, Northern ) I've always used the Aldi / Lidl chargers - based on 'Folklore' that these were a rebranded CTEK charger.
They are not!
I borrowed a CTEK charger for a week, and brought back to life a variety of batteries
I have 3 Land Rovers, S1 to Puma. (she has a BMW that never causes a problem) a VW T4 camper (plus 'leisure' battery) a VW Fox (for when the girls are back home) a variety of Golf trolleys (with batteries, owned by the