Do TV use electricity when plugged in but turned off?
If you used a flashlight then you might have realized how easily the battery would run out of power. Most often than not, it will only last a few hours if used for the entire night as with camping. This is because older types of flashlights use incandescent bulbs which require higher power ratings, resulting in poor management of power. This prompted the majority of manufacturers and consumers to find a way to extend battery life.