Had the time to check out a Solar LED Lantern that has only one LED powered up. Took the Lantern apart and discovered 5 of the 6 LEDs were dark I ordered what appears to be a replacement and will install them when they come in. Of course they may be installed backwards but no need to remove them until I have the spares. I also found poor solder joints and a broken wire from the OEM battery pack. It will behoove all to have spare batteries to install when the OEMs go bad.