NiCd AA 1.2V 200mAh Rechargeable Battery the advantages is high energy density, cheap, wide operating temperature range, excellent over-charge/over-discharge protection, stable discharge voltage, long life cycle of more than 500 times. We can also customize the battery pack according to your requirements. A variety of nickel-cadmium battery packs from the battery pack below, which can be used for different devices. And we often get the question: Can I use AA NiMH Rechargeable Batteries in place of the NiCD? The short answer is that we do not recommend. The reason is that the sun charges the batteries in the solar lights at a very slow rate. NiCd batteries will fully charge at a low rate. NiMH may not charge up properly.