What backup charging option is available if there is not enough sunlight?
The Brightown HLS-W-XXXWW-S features USB connectivity, which enables backup charging during prolonged periods of inclement or cloudy weather. If the USB charging is not working, the manual recommends trying a different USB cable, as a faulty cable may be the cause. (Pages 4, 7)
From the official Brightown HLS-W-XXXWW-S LED Solar Firefly Light manual, page 4
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