Based on this product's specifications, here are some alternatives and similar models
iPhone 6 Plus Replacement Battery 2915mAh Li-Polymer
Summary description:
High-quality replacement lithium-polymer battery for iPhone 6 Plus with a capacity of 2915mAh. This internal power cell is designed to restore original device performance and battery life. Ideal for professional repairs, this reliable component ensures stable voltage and safe operation for your smartphone, effectively resolving issues related to battery degradation or failure.