For about $20, you can get a new battery for a trail rat. Go to a Batteries Plus or similar store and for the price of the battery, they will take the wire lead off the old battery and put it on the new battery. You can even upgrade the battery from SLA to NiCAD or NiMh and get a lot more run time or smaller battery.

If you are satisfied with the trail rat, keep it or send it to me!

Good luck.