Based on this product's specifications, here are some alternatives and similar models
Just5 Battery for BLASTER mini, 3.8V 2000mAh Li-ion
Summary description:
Replacement Li-ion battery for Just5 BLASTER mini smartphone. This 3.8V 2000mAh power cell is a Grade A used component designed to restore the operational capacity of your mobile device. It provides reliable power for daily use, ensuring compatibility and stable performance for your specific phone model.