I saw this: Alcatel One Touch Power Bank - Red : All Accessories
I'm trying to work it out. I thought the suction cups were to attach to the device, but it says they are to attach your device to any surface... so you can attach the battery pack to any surface, but how do you attach the phone to the battery pack (other than the usb cable, which probably is not meant to securely hold the weight of a phone). I know: Stick the battery to the wall and the phone on a nearby flat surface, but if you have a flat surface, you can put both items on it!
I've seen Iphone battery packs that are like a large case - I always smile when I think that the manufacturers fight to sell super slim phones to people who then wrap them in large casings.
Anyway, I got to thinking, "Why not use magnets to attach the pack to the device?" The problem is that you need a casing that is magnetic or a device with magnets in it...
So, what if a battery pack was made with a curved surface to fit a webOS phone? What if it had magnets to hold it in place? A short cable could come from the side to connect to the USB and supply power.
But if you wanted to be REALLY ambitious, you could enable the pack to charge the phone wirelessly and even charge the pack itself wirelessly with a touchstone! Of course, all these wireless charging stages add up the inefficiencies.
A simpler thought is to have a box shaped battery with a USB cable that carries the correct charge and voltage to power a touchstone - battery-powered wireless charging: Place the box on a surface, stick the TS on top, plug in and sit your phone on it! ;-)
Of course, when your device has a removable battery, simply buying a spare is the easiest option... ;-)
I'm not planning to make any of the ideas above and they are perhaps pointless, but if anyone is making battery solutions, feel free to take those ideas if you like them.