How to charge the device manually when the weather condition is not good?
To manually charge the device, it is suggested to use xenon lamp or halogen lamp as the light source. Among the two, xenon lamp has stronger light and thus leads to faster charging. The bulb power should be selected between 150-300 W, as higher power results in faster charging speed. Yellow light is slightly better than white light.
A xenon lamp also goes with a BALLAST, and both xenon and halogen lamp need a spotlight cover and a power supply. Prepare necessary items before usage. Due to the high temperature of these lamps, it is recommended to use a tripod for stability during use, facilitating temperature adjustment and safe operation. We suggest searching for keywords like "xenon headlamp" or "xenon camping lamp" on shopping websites, as the lamps that appear in the search results usually come with spotlight.
Charging process:
Connect the power supply and turn on the lamp.
Place the device under the spotlight, with the device's solar panel perpendicular to the light source.
The distance between the device and the light source is influenced by the power of the light bulb; the greater the power, the greater the distance. We recommend that you monitor the environment data of the device and adjust the distance during the charging process to ensure that the temperature in the environment data does not exceed 60°C.
According to the results of our laboratory tests, it takes approximately 20 hours to charge a 40 mAh battery from 3.6 V to 4 V at a distance of 15 cm. The light source we used is a 100 W xenon lamp.
Note: Protect your eyes from strong light damage during the process. Keep the lamp away from flammable materials for safe charging.