6. Batteries
Batteries have a long timeframe of realistic usability of approximately 10 years and after that time-frame, there is no wellbeing danger except for they just become pointless.
On the off chance that on account of a crisis, for example, a force cut, it is basic that your batteries are working to energize a light substitute. Spotlights are a typical model here. Thus, it is prescribed to keep a load of extra batteries to guarantee that you will never be left in the absolute dull.