Mostly for small apps." One of the worst things you can do to a Li-ion battery is to run it out completely all the time. Full discharges put a lot of strain on the battery, and it's much better Charging or draining a lithium-ion battery from 0-100% is known as a charging cycle, which is the main factor that causes batteries to degrade. Battery degradation is less crucial in a phone, as most people buy a new one every two or three years, or get a new battery for their phone after a while. In fact, most lithium-ion batteries last longer if you don’t discharge them all the way. So the moment you hit 25% or so, go find a charger. Myth #2: Always Charge Your Battery to Full. This is another throw-back to older battery types. Newer lithium-ion batteries aren’t as picky. If your battery is actually damaged, you can repair it yourself with a soldering iron (and a little confidence). Again, I must warn you that dealing with batteries and electronic devices carries some inherent risk, so proceed with caution. The battery cell in the video below is a rechargeable lithium-ion cell from a laptop battery pack. The recommended temperature range for storing lithium batteries is typically between 20°C and 25°C (68°F and 77°F). Avoid areas with extreme temperature fluctuations or locations that are prone to freezing temperatures, as cold temperatures can negatively impact battery performance. 2. It is generally recommended to keep the battery charge level between 20-80% for prolonged battery life. If you plan to store your device for an extended period, charge the battery to approximately 50%. This level prevents the battery from draining completely during storage and helps preserve its capacity. The lithium-ion battery: State of the art and future perspectives Renewable and Sustainable Energy Reviews , 89 ( 2018 ) , pp. 292 - 308 , 10.1016/j.rser.2018.03.002 View PDF View article View in Scopus Google Scholar The expansion of lithium-ion batteries from consumer electronics to larger-scale transport and energy storage applications has made understanding the many mechanisms responsible for battery degradation increasingly important. The literature in this complex topic has grown considerably; this perspective aims HL9o.