With a TM it will always be a Hydroforce type sprayer.
I have used the hudson battery sprayers and they were really good for the price....even better for the price.
I've been looking at the rocket sprayer.
Right now I'm using a keg sprayer and a car tire pump.....Works amazing. I hooked a pressure sprayer gun from Northern Tools and a 3ft hose from it.
Fill it about 3 1/2 gallons and leave 1 1/2 gallons of air......80 to 100 psi and it's good to go.
The Black n Decker air compressor can hook to a cig lighter in the truck or to the AC plug in the home.