I'm using WP7 Mango 7720, can confirm for my case that standby battery time is very good after the camera trick. However, when under moderate-to-heavy load, the phone tends to heat up a lot and suck battery relatively fast. I'd say for standby, it's on par with HD2 Android NAND. For under load, it should consume about 30-50% more battery than Android NAND.

With full push email, constant 3G/WiFi on, about 20 messages and about half an hour heavy web browsing (reading multiple news using Weave quickly, opening a lot of web pages), the phone can last me 18 hours and still have 30% of juice left. If used for really heavy usage, the battery will definitely be gone fast. Putting the phone under load for too long will also cause the phone to overheat SUPER fast and it's SUPER hot.

Tried to download 300MB worth of maps in Navigation app before. Around 30MB (which was about half an hour) later, the phone was super super hot.

Btw, for the new Mango I don't think you can partition your SD card for WP7 and Android. But you can always use a 2nd SD card and run Android using SD. I'm using that method, I'm using Android mainly for GPS navigation when needed only.

And to whoever that is going to try Mango on your phone, I strongly suggest you flash back to stock ROM first, and then format your SD card. I did those things and my update process went 100% smoothly, I didn't need to do the MAGLDR hard reset or anything.

I saw a lot of people in the xda thread with various problems so I guess it's better to be safe than sorry.

Which instructions did you follow? I'm interested to dual boot them in a single card too, less hassle.

Hmmm, the last time I did for my activation, the person just asked for a picture, no need the white paper with email address.

You can ask some of the helpful Lowyat forumers here who have HD7 to help you out with this. =)

Depends on which service support you get I guess. I've seen a lot of people getting actication code without picture, a lot even said they had HD2 and needed an activation code and the person just give it to them.

Mine needed a picture of a HD7, which I took off the net (which looks amateur-ish), and voila.