Knock-off = copy
http://www.hobbycity.com/hobbycity/s...(USA_Warehouse)
Has same specs. The buttons, the external wires and balance ports, these layouts are the same, look familar? Case is bigger and different color, bet yours has a blue backlight too just like this one.
Not saying their not good, I have one of the Accucels and its a good charger, just haven't seen the version you bought before.
I think the Accucel is not the orig either, its a copy of the iMax charger.