
Hello, it is my pleasure to assist you.
In general, it is recommended to charge when the battery has one or two bars left. It is important to avoid over-discharging, which can cause damage to the battery. Similarly, overcharging for a long period of time can also damage the battery and reduce its life span.
I hope this information is helpful to you. If you have any questions, please feel free to ask. Thank you for your support!