Water activated magnesium-air battery inside;Â
No need of grid charge;
Only by pouring a little water with the watering can will light up the fairy lights and tree, easy to operate;
Can be used anywhere AC power is not available. No need to worry about the location of an outlet;
No need of recharge maintenance, only need the step of watering or battery replacement;
Short activation and response time, no loud noise generation;
Long shelf life at dry storage but without self discharge nor capacity loss;
Together with ornamental feature and functionality, green and environmental friendly.