Playback: .3gp, .3g2, .mp4, .wmv (Windows Media Video 9), .avi (MP4 ASP and MP3)
Battery3 Capacity: 3300 mAh
Embedded rechargeable Li-polymer battery
Up to 25 hours for 3G
Up to 585 hours for 3G
AC Adapter Voltage range/frequency: 100 ~ 240 V AC, 50/60 Hz
DC output: 5 V and 1.5 A
As you can see the high end HTC does have more features but since the HTC One has a embedded rechargeable battery the battery can't be replaced by the enduser so if anything goes wrong with the battery you will need to take the device into a Sprint store if you have the protection plan and if not you will need to send the phone to HTC, my spouse was without his HTC One for about 2 weeks because of this issue phone had to go back to HTC. Now with the HTC Desire 510 the back come off easly so if you ever need to replace the battery it's just a trip to retail store.
Specs were provided by :gsmarena.com
"Disclaimer: The Product Ambassadors are Sprint employees from many different parts of the company that love technology. They volunteer to test out all sorts of Sprint devices and offer opinions freely to the Community. Each Product Ambassador shares their own opinions of these devices, therefore the information in this post does not necessarily reflect the opinions of Sprint. The PA's do not represent the company in an official way, and should not be expected to respond to Community members in an official capacity. #sprintemployee."