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Can a 3.7V battery be charged with a 5V charger？

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.04.11
In our daily life, it is common to have a dead phone but forget to bring a charger. Therefore, many friends choose to borrow someone else's charger to charge their phones, which inevitably leads to a mismatch in current and voltage. So, can a 3.7V lithium battery be charged with a 5V charger? Let's take a look together!



Can a 3.7V lithium battery be charged with a 5V charger？

Short term emergency use is possible, but prolonged use can cause battery damage, as a 5V output USB charger has a higher voltage than a 3.7V lithium battery. Long term use can cause battery damage. Batteries have a specified maximum voltage and current, and exceeding the maximum voltage or current can cause damage to the charger.

Mobile phones are regular chargers. Can fast charging be used to improve charging speed？

If your original phone charger belongs to a regular charger, then fast charging cannot be used to improve charging speed. Many users want to switch to a fast charging to improve charging speed, which is actually very wrong. Firstly, mobile phone charging has a rated power, blindly replacing the fast charging charger will not have any effect, and the charging time will still be at the previous charging speed.

Meanwhile, although fast charging can also be used for charging, long-term high-power charging can damage the battery, making it less durable. Over time, the only option is to replace the battery. Therefore, if the phone does not support fast charging, do not force it, otherwise it will only be more than worth the loss.

Conclusion

In summary, a 3.7V lithium battery can be charged with a 5V charger, but it can only be used for a short period of time. It is best to choose an original charger for more stable charging, as power, voltage, and current parameters are completely matched according to the rated power of the phone, which causes the least damage to the phone battery.
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