How to tell if a battery is empty or full? Chip.de has a suggestion on this subject. All you need for this practical method is a fully charged battery. Take it and the battery to be tested and drop it vertically onto a hard surface such as a table from a height of about 15 to 20 centimeters.
A completely flat battery will bounce back up after impact. The battery, which is still charged, barely bounces at all and falls immediately. Alkaline batteries contain a gel mass. When the battery runs out, it becomes solid. The sturdy interior allows a dead battery to bounce off the ground and back into the air. While the batteries are still charged, the gel mass is still soft and cushions the blow. Therefore, charged batteries fall directly without bouncing.
IT IS BASED ON A RESEARCH
According to an article published in TÜBİTAK Bilim Genç in 2015, this is actually based on a research by scientists from Princeton University. Scientists have determined that the degree of bounce of batteries is related to their charge rate.
According to the research published in the Journal of Materials Chemistry A, the height reached by the batteries dropped from a certain height after hitting the floor increases as the charge rate decreases.
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