The option for 80-90-100% charge settings model is the one I would get for a decent inexpensive charger.
Yuba Mundo w/BBSHD
Specialized Hard Rock w/9c clone, statoraid, hubsink
Trek Fuel 90 w/BBSHD
Above all run on 14s4p 52v li-ion
Ecobike folder 36v
Currie Flyer scooter 24v on 24ah of SLA
Every trip made with electric bike is one less car trip, saves money, no toxic fumes, less noise, less impact on roads.