It looks like you're looking for a 2800mAh lithium battery for theHTC Desire 728 seri

For a high-quality replacement battery, you'd want to ensure the following spec

• Capacity: 28

• Type: Lithium-ion (Li-ion)

• Voltage: Typically 3.8V or 3.7V, but it’s best to confirm the exact voltage with your device's original battery specifications.

• Compatibility: Ensure it's compatible with all the variants of the Desire 728 (e.g., D728G, D728X, etc.).

You can often find this battery available from online retailers, such as Amazon or eBay, or through phone repair shops that stock compatible replacement parts for HTC devices. Be sure to check that it comes from a reputable supplier to guarantee safety and longevity.

If you'd like help finding a reliable source, I can assist with that too!