Start with a controlled USB charge
Where the maker permits, use the specified cable and power source indoors. Inspect ports for debris or moisture without inserting metal objects. Allow the device to reach a supported temperature before charging.
Understand what the solar panel can do
Small panels often maintain or replenish a working battery rather than quickly recovering a fully depleted one. Clean the panel as directed, remove shade, verify orientation, and confirm the connector is fully seated.
Look for high power demand
Frequent live view, alerts, weak signal, cold weather, or repeated reconnecting may consume energy faster than the panel restores it. Reduce one demand temporarily and compare the battery trend.
Escalate safely
Stop using swollen, leaking, damaged, or unusually hot batteries. Record the model, charger, indicator behavior, temperature, and steps tried before contacting the manufacturer.