Instructions to charge your LINKA can be found in the “Charging LINKA” section.
Make sure LINKA is unlocked
Make sure that you are charging your LINKA while it is unlocked. If LINKA is charged when it is locked, the siren will go off.
Damaged USB Cable
If LINKA’s LED does not light red when you plug it in and it does not charge overnight, the USB cable may be faulty. Try using a different micro-USB cable.
Low Power Supply
If the LED does not turn on after testing multiple cables, try using a power supply with a higher amperage (ideally at least 2.4 A).