Yes they have rechargeable batteries so you can sometimes put new batteries to make they work and a lot of times it can be where the screen that the sun hits it to recharge can be not able to recharge the batteries and easily just buy another lot of lights.

Yes, all solar lights have rechargeable batteries. These are what store the energy during the day and are the power source for night time operation.

Yes, I found it cheaper to buy new lights too. Mind you, really cheap solar lights seem to give up quickly – it’s better to spend a little more for something that will last.

I don’t know but a sparkie may be able to tell you.

yeah cheap enough to buy a new one.

A lot of Solar Lights have batteries in them as on cloudy days they don’t get enough sun to make them work at night. The batteries in some of them can be recharged in a special battery charger. Some have wiring and a special very small solar panel up high if you need to get more sunlight where otherwise they would be in the shade part of the day. My next door neighbour has attached his to a pole. A friend of mine has clipped his to his house gutter.