Can either nicd or nimh batteries be used in solar patio lights?

Yes, both NiCd (Nickel-Cadmium) and NiMH (Nickel-Metal Hydride) batteries can be used in solar patio lights, but NiMH batteries are generally preferred due to their higher capacity and lower environmental impact. NiCd batteries can suffer from memory effect and may have a shorter lifespan, while NiMH batteries provide better performance in terms of energy efficiency and longevity. It's important to check the specifications of the solar lights to ensure compatibility with the chosen battery type.