Based on this product's specifications, here are some alternatives and similar models
Battery Philips D (LR20) Alkaline — Pack of 2
Summary description:
Alkaline Philips D (LR20) batteries in a blister pack of 2. Standard D-size (LR20) cylindrical cells designed for devices requiring higher capacity and longer runtime than smaller cells. Suitable for torches, radios, portable speakers, toys and other household electronics that demand stable voltage and extended use between replacements.