Things like our Camera / Navman and my phone [ aprox 5 yro ], The phone gets a run about two or three times a year [ generaly keeps the house fridge company ] and the Navman [ aprox 4 yro ] probably half a dozen times a year, the camera usualy about the same ..
Batteries usualy are dead flat and come up, seem to hold pretty well for a few days / weeks depending on use, though the camera batteries are not holding charge as long as they used too, but thats down to being over 10 year old .