Charge it a few times. This will not hurt the battery. I’ve done it a bunch of times. And make sure you have fresh bateries in your remote. A got at least 5 minutes using a 3.0 motor when I did this.
If you really want good time get a NiMH battery and make a 3V charger like I’ve previously posted. I’m not kidding you when I say I drove my car hard, over jumps and around turns, throttle on all the time for 20minutes and it still had pleanty of power to go over the jumps! I’m not kidding. After 30 minutes it started to get a little slower but it still would drive around at abouthalf speed.
-Peter