The fragile electronics within battery testers are protected by a hard casing, which means they can usually be stored in a toolbox, draw or anywhere else dry.
Cleaning a battery tester
Electricity detectors and testers do not require any deep cleaning – just wipe them down with a damp (not wet) cloth every now and again. It may be helpful to ensure any probes or screens are kept clean, again using a cloth, to ensure you get accurate results. There are specialised cleaning wipes available for cleaning these.
Battery tester maintenance
Ensure your devices are fully functioning before each use.