New Engine problems!

hahaha I'm a big idiot...turns out my damn battery was dead. I bought a new charger and a motor...well the charger said it was charged when i first plugged it on but I had the wrong setting so when i put it in it had power but i wasnt used to the added power needless to say my old crappy motor had the same power as this one did with a dead battery! I've never seen a car act like this when the battery is going dead though...strange...