I've got a Nitro 180TF. I was having the same problem with mine. It came out with a 48# Motorguide 12/24. Even after I replaced the batteries it was still slower than I would like. I stopped by Cave Run RV outlet and spoke to Rob. He often has used trolling motors for sale. I bought a 67# thrust for $75 and my trade in. This worked great for me.. While I was trying to decide how to fix my issue I asked a lot of questions about the same thing. I talked to Dave Smoot who owns KY Trolling Motor Service and my brother in law who is an electrical engineer. Their advise was to Run heavier gauge wires even with my new motor. this allows for less resistance and pull on your batteries giving them a little longer life. If you have a tracker you probably have 8 gauge wire. you can go up to 4 if you want to try and run it through your gunnels and add in line circuit breaker. This may give you a little more time on the water. I also agree with a couple of the other fellas. get another battery and run two of them in sequence. Your trolling motor will only pull 12v and two batteries offers longer life because your motor is pulling from both of them rather than just one.