I am an experienced electrician and I personally think this thing is useless. The output current is too small, so small that it can be ignored, and it has no charging effect. Such a small solar panel is useless, I advise you not to buy it. spend tens of dollars to buy a charger, or replace the battery. From your description, your battery performance is no longer good. It looks like it needs to be replaced.
Can the solar car charger sold online really charge the battery?
Introduction Can the solar car charger sold online really charge the battery? I am an experienced electrician and I personally think this thing is useless. The output current is too low, so low that it can be ignored.