I received them at noon and at 5:30 in the afternoon when the sun went down, I put new batteries in them and placed them on the balcony. I turned them off the next morning at 11, then when it was 5:30 again and it got dark, I tried to turn them on but their brightness was barely visible in some of the colors (yellow and red). I put new batteries again and they shine like new.

In conclusion, they didn't even last 24 hours with their normal strong light on, let alone fewer hours. How long would they last, 2? 3? 4? days before needing to change the batteries again? I don't know if it would make a difference if I used the best batteries on the market, but something like that is really needed for them to last at least a few days with proper brightness.

I don't know if all battery-operated lights are like this and I may be unfair to them, but if that's the case, then buying such a product is definitely not worth it.

From my side, it's a no, I will only turn them on for a few important days so that they don't consume all the batteries.

UPDATE 2.1.2023: in a few days with hours of use (e.g. 6 to 12 at night), they lose their brightness and you can barely see them shining. From me, it's a big NO.