Hardoll Solar Light for Home Garden Decorative LED Balcony Deck Waterproof Lamp (Refurbished)
The solar light has a replaceable 18650 battery inside (four normal screws). I tested it for one week before permanently installing it. It is easily charged even in shade and lasts full night with no measured reduction in luminosity. Didn't measure the battery charge but I at this cost, it's a steal. On top of it, it's a monocrystalline panel!