If however your solar lights had NiMH or LifeP04 batteries then you should those particular types when replacing the batteries. NiCd’s are available in the following battery sizes: AA, AAA, C, Sub C, D , and 9 Volt , and we offer NiCd Rechargeable Batteries with Tabs, Flat-Tops , and have eye-popping NiCd Batteries and Charger Combos!