I still have 4-5 battery, C-Cell Maglites , with (now older) LED bulb replacements ( probably about 140Lumens ) and āwindow breakerā tail caps , in each of our cars. The 5 cell must be from the early 1970s . They are still industuctable. I check the batteries about twice a year, with a battery meter and keep an extra set in each car, as back-up. Once a year , I wipe them down, inside and out, scape the contacts with an emery board and spray everything with generic silicone spray from the supermarket or hardware store. I also have a few long D-Cell Maglites in all our bedrooms and kitchen. Same maintenance schedule. So far ,so good.