A reliable replacement for OEM solar light batteries.Maybe just a bad batch, but not all of them worked.BATTERIES RECEIVED WERE WEAK RECHARGED A COUPLE AND THEY WERE GOODDID THE REST ALL FINEDID NOT RETURNSo far so good. You can see the difference right away from the old batteries. Let them charge fully like the instructions.received these batteries mid afternoon, didn't install them until 3hrs later. Just checked outside tonight my solar lights, so far so good they worked right instantly. Ordering moreLiked that they arrived and worked.These are a perfect battery replacement for my solar lights. They work perfectly and hold a charge very well. My lights last most of the night.Very pleased with this purchase.Used these batteries for outside/solar crackle lights in yard. Working great.