Battery charging
Connect the USB cable to the connector at the end of the device ([4] in the general view in section “Design elements”) and to a charger (5 V, ≥ 0.5 A) or a computer USB port. Leave the device connected until charging is complete.
Blue indicator [7] — charging. The screen shows the charging icon 
.
When complete, the blue indicator goes out and the icon changes to external power 
.
The battery can be recharged or charging interrupted at any level.
Check the charge level by the battery icons 
; the percentage shown next to them updates in real time.
If the battery indicator 
is empty — connect the device to a charger
To ensure proper charging conditions and a long battery service life, charging is blocked when the device temperature is above +40 °C or below 0 °C.
For charging, use only USB chargers rated at 5 V and at least 0.5 A, or a computer USB port. Connecting to an unsuitable power source can damage the device. Damage caused by improper charging is not covered by the manufacturer's warranty.
If the battery is fully discharged, the device may not respond to turning on. Charge the battery first. If the battery does not charge, connect the charging cable, then disconnect and reconnect it. The device will then be ready for operation.
Updated: Oct 21, 2026