The Seidio Innocell Slim Extended Battery is designed for the customer who needs extra life, but doesn't want to add any thickness to their device.

This model fits in your HTC Thunderbolt, Merge, or T-Mobile myTouch 4G existing battery space and doesn't require a replacement door, which makes it a perfect replacement for your original battery.

Features:

• Made from the highest quality Japanese Cells
• More capacity in the same form factor
• Fits in existing space so no replacement door is needed
• Perfect replacement for your original battery
• Capacity:  1600mAh