The battery for the HD 6 is just a tad larger than some of the newer phones/phablets. Here's a chart comparing it to other devices:
- Fire HD 7 = 4,400 mAh
- Gal Tab 4-7 = 4,000 mAh
- Nexus 7.2 = 3,950 mAh
- Fire HD 6 = 3,400 mAh
- Nexus 6 = 3,220 mAh
- G Note 4 = 3,220 mAh
- LG Volt = 3,000 mAh
- LG G3 = 3,000 mAh
- iPhn 6 Plus = 2,915 mAh
- Galaxy S5 = 2,800 mAh
- HTC 1 M8 = 2,600 mAh
- Fire Phone = 2,400 mAh