Based on this product's specifications, here are some alternatives and similar models
Button cell battery VINNIC G1 LR621 / AG1 Alkaline 1 pc 1.5V
Summary description:
VINNIC G1 (LR621/AG1) is a single-piece 1.5V alkaline button cell suitable for small electronic devices such as watches, calculators, key fobs, and medical instruments. Provides stable voltage for low-drain applications, easy to install in compact battery compartments. Sold as one cell and useful as a replacement battery for devices specifying LR621/AG1 type.