"You should let your phone battery drain completely before recharging," "Overcharging batteries causes explosions"... For a long time, conflicting claims about charging have circulated, and common misconceptions often leave people confused. So how can you charge correctly to ensure safety and extend battery life? Below, we detail the three major misconceptions about phone charging and their significant risks.
Misconception 1: New batteries require several full charge-discharge cycles to activate. Different battery types require distinct charging methods—always follow the manufacturer's instructions. Early nickel-cadmium and nickel-metal hydride batteries needed similar "activation" processes. These batteries exhibited a "memory effect," where charging before full discharge led to overcharging. Over time, this caused users to perceive rapid battery depletion.
However, most batteries used in modern smartphones and laptops are lithium-ion batteries. Their initialization process is completed during manufacturing, so no activation is needed before first use.
Misconception 2: Reducing charging frequency extends battery life.
Typically, lithium-ion batteries can withstand hundreds of charge-discharge cycles. Here, a cycle refers to fully discharging the battery and then fully recharging it—not simply plugging in and unplugging the charger. Lithium batteries lack a memory effect and can be charged at any time. Deliberately discharging the battery completely before recharging to reduce cycle counts does not extend battery life; it actually has a negative impact.
Furthermore, if a phone is used until it automatically shuts down, the lithium battery may experience excessive discharge, causing internal voltage to drop too low. This can result in the device becoming unable to power on or charge. Therefore, lithium batteries benefit from "frequent, shallow charges"—more frequent, partial charge cycles actually help extend their lifespan.
Misconception 3: Overcharging causes batteries to explode.
Lithium batteries typically feature safety protection circuits and multiple safeguards. These automatically cut off the circuit during overcharging, over-discharging, or short circuits. Excessive internal pressure triggers venting mechanisms to release pressure, while overheating activates thermal fuse protection, halting electrochemical reactions.
Therefore, unless there is a manufacturing defect, batteries will not explode from being plugged in for extended periods. However, leaving a fully charged battery connected to power will keep it in a constant state of full charge. While this won't cause an explosion, it accelerates the rate of capacity loss.
Additionally, there's a rumor that answering calls while charging a phone can cause explosions.Experts state this claim is unfounded. If such a risk truly existed, manufacturers would program devices to prevent phone calls during charging. However, from a health perspective, charging cables restrict user mobility. Using a phone while charging may cause prolonged immobility, leading to muscle tension. Therefore, it's advisable to unplug the device before making calls. Never cover the battery with any objects while charging, and avoid placing it on beds to prevent fire hazards.
This concludes our overview of the three major misconceptions about mobile phone charging hazards. We trust you now have a clearer understanding. Finally, we sincerely wish you good health and happiness.