I have two new Pleo's coming and am planning on building a custom battery that I can just use to drop rechargeable cells into. I don't feel like dealing with this never-ending battery issue that comes with Pleo, and I'm sure most people here are tired of it as well. I will update this post once I start working on the project, but I already found a battery pack that's under $2. There's really no downside to this. If it's as cheap and easy as I believe it will be, then people here will no longer have to worry about running their dinosaurs once all the Ugobe or Innovo batteries disappear.
By the way, are the Pleo RB batteries more hardy and powerful? Or should I worry about having to build one of those as well?