Originally posted by sup
i did search already and found only one person to give his opinion regarding the apex zero. thanks guys! are there different pitbull versions (like the millenium "ver 1.2 and pro")? am a newbie and will be buying a 2nd hand charger due to budget constraints. thanks! 
There are two versions of the PitBull. There is the PitBull, and PitBull Stealth.
The only difference between the two is that the PitBull Stealth has a black case versus the original's translucent blue. The Stealth also has the updated power supply wire harness, which has color coded ( black and red ) wire. The original pitbull had a smooth positive, and a ''ribbed'' negitive wire.
All the hardware is the same, it's just a cosmetic difference.