King Song KS-14D Manuel D'utilisation page 44

5.2 Charging
The device has a built-in lithium battery, no extra battery installation is required, just charge the device
when it indicates "low battery".
Plug in the power source after inserting the charger plug, this can prevent potential risk to ensure a
safer charger
When the red lights turn into green, indicating the charging is completed.
If not in urgent need, please wait until charging complete before unplugging, because after charging,
the protection circuit will perform flow equilibrium
Battery level: RGB indicator is used to indicate battery level, will go off one by one with the level
decreases. Please check power level before use to ensure there is enough power for the return trip.
Battery level of KS-16 and KS-16S is shown in 9 levels, corresponding battery levels are shown as
following:
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