Batteries in remotes, cameras, and other devices

It's hard to keep track of your battery operated devices, Non-rechargeable batteries swell up, corrode, ruin terminals, etc. Check the devices you have, and try to check all of them! I remove the bad battery and clean the battery compartment, paying special attention to the + and - terminals, using straight vinegar and a swab. After the vinegar does its work, clean with isoprophyl alcohol, dry, install and test new batteries.