7. RR13 battery and charging instructions

Battery:

This product is powered by a replaceable 3.7V 10440 lithium battery with a protection board. We recommend using the included battery.

When replacing the battery, please pay attention to the correct positive (+) and negative (-) orientation. Do not short-circuit the battery.

Note: The custom battery may have a slight protrusion and may not look perfectly smooth—this is normal. This protrusion is part of the protection board designed to ensure safe charging and discharging. Due to manufacturing limitations, it may fit more tightly when inserted—this is normal.

Charging:

Compatible with 5V–2A charging. Connect the USB cable to the USB input port at the bottom of the RR13. The indicator light will breathe during charging and will remain constantly on when the battery is fully charged.

Battery life:

Radio mode:

Headphone output (40mV volume): 7+ hours

Speaker output (normal indoor listening volume): 4+ hours

AMP mode:

Headphone output (40mV volume): 18+ hours