Instead of choosing a one - piece removable battery cover that encompasses the entirety of its rear (as it did on the first Titan), the Titan II's back is separated into three sections, and only one — the cover protecting the SIM card panel near the bottom of the device — is removable. (engadget.com)
Turn the little rodent over and you'll see that the removable battery cover used in the original Magic Mouse is gone; now there's just a solid aluminum bottom with a single Lightning port between the guide rails. (lifewire.com)
The good thing with the removable battery cover is that it creates opportunities for 3rd parties to create battery packs that will integrate very well with the product. (ubergizmo.com)