Review on GEILIENERGY AA Rechargeable NiCD Battery Pack of 12 - 1.2V 600mAh High Capacity Batteries for Solar Lights, Garden & Yard Lights by Todd Winter

Sometimes the batteries can be replaced in the sunlight to make them work. Not always, but the battery isn't to blame. Solar lights simply withstand many weather conditions. But for those where changing the battery is all they need. I'm glad I bought the batteries. I had solar lights for years before I found out. With most solar lights, the battery is easy to replace, so I would recommend replacing it to keep the light working.