charger needed

Where can I get a good 48v/20ah charger that shuts off atomatically? Will get a new set a batteries. Last set cooked because the stock charger with my XB-600 did not shut off when charg was done. Any ideas wher I can get both? Thanks for info.

does anyone know where a 48 volt 10 amp ,E-MAX battery charger can be bought ,or even 2 and I will keep a backup. the charger model E07-0020b-usa . if there is such a thing , E-mail me at rick-peg [at] hotmail.com with the happy news that will allow me to charge up again.