Man of Honour
Hopefully I've bought better cells from Dillinger but just in case I also invested in a Lunar charger (imported from the US!) which can be programmed for charge rate and charge percentage. So charge to 80% for storage and then charge higher just before hoping on the bike to cycle to work. Same discipline I apply to my big EV except I tend to keep the big EV at a lower SOC range see below.
Both my batteries I bought last year have Samsung cells and using advice from the awesome Pedelecs forums I turned down one of the pots on a charger so it only outputs at 40v instead of 42v so it only charges around 90%.
Funnily enough my new Sony phone has a setting where I only charge to 90% and once a month it charges to 100%.
I wouldn't mind a link to the Lunar charger please so I don't have to keep swapping chargers.