I purchased a charger from BafangUSADirect/Ebike Essentials for my 48 volt battery that's designed to charge to 80%, 90% and 100% capacity (as charging to less than 100% extends battery life). The charger I received doesn't turn off, hitting 88% before I unplugged it when set to 80%. Both the charger's voltage meter and the voltage meter on my bike showed identical readings at 88%. I contacted BafangUSADirect's customer service department to obtain repair or replacement service and was told that since I hadn't purchased my motor or battery from them (I own a Bolton/Area 13 Sabre) they couldn't guarantee compatibility with their charger! Please understand that voltage is voltage-to deny responsibility for their charger's malfunction is tantamount to denying the laws of physics! I guess now it's time to start disputing the charge with my credit card company. BEWARE BafangUSADirect/Ebike Essentials!