(...) battery life* of more** than ten*** years****.
*) Where "life" means "the ability to store any charge" as opposed to "ability to store enough energy to power a device for a given length of time".
**) Well no, not really.
***) Or one, or maybe ¼.
****) Assuming the device stays connected to mains power*****.
*****) Assuming the mains power does not lose power for more than ten minutes at any given time.