As long as you are getting NiMH batteries, and you're sure you have the Mega 1 AC/DC Quick Charger, part number DYN4010, you will be fine. Per the Dynamite website:

Product Specifications
Type:Timer/ Trickle
Input:AC/DC
# Cells:6-7
Charge Rate:4A
Battery Type:NiCd and Ni-MH
Voltmeter:Taps
Amp Meter:No

Maybe the other threads/posts you saw were referring to a different charger, or maybe LiPo or another type of battery?