Quote Originally Posted by poolbuoy
They now have a replacement battery/motor pack that they sell--it's pricey, about 1/3 of the total price. Had I contacted them during the warranty they would have just given it to me. But I had to buy it. This is no slam on PB--The warranty is 1 year, and I contacted them after 2 1/2 years. Still, they were pretty good about it--I couldn't find my charger so they sent me a used one for free with the battery/motor.

But the new battery/motor is fairly easy to install, and BOY! WHAT A DIFFERENCE! It's running like it's supposed to again. I also ordered the silt bag--it, too, increases the PB's effectiveness.

I don't know about the newer PoolBuster models, but I am still very, very pleased with mine. It's like a new unit again.
This is what I meant by the upgrade kit....
It's not an upgrade--it's a replacement motor/battery pack. It runs the way they were supposed to run from the beginning. I think I had one that ran, but was hindered with a less-than-100% battery. You should simply get a 100% motor/battery in your new machine. As far as I can tell, the only change they made was a slight improvement in the on/off switch to reduce the chance of leaking. I don't know if they've upgraded the internal battery--you cannot see it.