The last time we replaced the batteries in our wireless mouse, I decided to see if there was any life left in them at all and tried them in my battery operated toothbrush that had recently run out of juice. I was pleasantly surprised that the batteries from the mouse ran the toothbrush nicely for 3 more weeks before going dead.
We are in the process of switching out disposable batteries to rechargeable where appropriate in our home. In the meantime, we will check disposable batteries we thought were done, to see if they are still serviceable for another item before disposing of them.
