This is an application, so most of what today's filing tells us is certainly not set in stone, but new ideas include a "kinetic energy gathering component" within the band -- like the trickle charge feature found on watches -- to pump energy back into the device.

ENGADGET

Building on the strength of the ClearPad 3200, the ClearPad 3400 features a redesigned Analog Front End (AFE), an integrated charge pump, and advanced filtering algorithms for industry-leading Signal-to-Noise (SNR) and Signal-to-Interference performance.

ENGADGET: Synaptics launches a pair of mobile touchscreens at MWC 2013

Smit, which in charge of salvaging Prestige before it sank, said the operation - to pump the oil back to the surface - would cost nearly 50m euros and take several months to complete.

BBC: French sub to try patching Prestige