I went through 3 Banners and an Ultramax in 10 years, generally 2 hours a day on a CTEK conditioner, battery disconnected during winter lay up. Ended up fitting an isolator switch a few years ago as I too think it's much better than a conditioner. Last spring I fitted a Skyrich HJT12B-FP LiFePo battery (a lucky £44 Amazon deal). It sat unused all winter in an unheated garage and the battery lost none of it's charge, started straight away. According to the instructions that came with it, the only limitation on charger type is the charging voltage must not exceed 14.5v and the spec of my CTEK 0.8S seems to meet this. Although I've never needed to put it on charge so it's not been a problem so far. Obviously too early to comment on the longevity beyond the 18 months it's been fitted, but so far I'm impressed. Weighs a smidge under a kilo as well.