Based on this product's specifications, here are some alternatives and similar models
Battery Nokia Lumia 820 BP-5T
Summary description:
The Nokia BP-5T is a reliable lithium-ion battery designed for the Lumia 820. It offers a capacity of 1650 mAh, ensuring long-lasting power for your device. This battery is lightweight and easy to install, providing excellent performance and durability. Perfect for users who need a dependable power source for their Lumia 820, the BP-5T ensures you stay connected throughout the day.