These AA rechargeable batteries are specifically made for the “Titan Solar Light”. These are the exact replacement batteries that were installed originally. Please do not substitute any other “type” of battery in this light, it will not work. It is designed to work only with Ni-Cd (Nickel Cadmium) batteries. Titan Solar Lights produced prior to March, 2019 run on (3) AA batteries. Lights produced March, 2019 and later run on (4) AA batteries. Be sure to check your light to see how many batteries are needed before placing your order.