[Venue Pro General] TheManii:
Introduction:

The venue and it's evil twin brother the venue pro are one of the handful of devices that are pretty much identical except for the OS installed.

The Streak 5 and 7 are known to have rather poor battery life. The V and VP though definitely seem to have improved on the battery situtation though. (And in the case of the S7 it has as much to do with it having a much smaller batt then similar 7" devices)

The V and VP are more or less identical when it comes to internal components, the only notable change is the addition of a hardware slider keyboard and a downgraded rear camera.

I am going to do a battery rundown test where both devices remain in standby the entire time and see which lasts longer.

Most devices make up claims of '2-400' (8.3-16.7 days) hours of standby, which is usually impossible to achieve while still fulfilling it's actual purpose (ie ever leaving standby). This is exactly what I'll be doing as I dont currently need either of them.

I will be measuing the time via android's battery graph, which states the amount of time that's passed since it was last fully charged.

Rationale:

Besides the OS's involved, the apps vary wildly.

Since this is dell: it's more interesting to see how much the drivers affect it (as dell is pretty bad with both making them and giving the sources to them)

The more tasks you do by hand, the harder it is to keep them perfectly in sync

I'm lazy :D (I'm currently not using either of them at the moment, so it's essentially a free test)

Technical details:

A US Venue

Rom: StreakDroid4 2.5.0 (408 based) [Android 2.3.3]

All apps frozen (which means they are installed but cannot be launched/do anything)

SD card removed (as android ocassionally scans it for media(?))

Clock settings: Ondemand 256-998 MHz

An AWS Venue Pro

Rom: 7720 (7720 Drivers) [Windows Phone 7.5 (Mango)]

No apps installed

SD card empty (nothing synced via zune)

Battery saver mode enabled

Common to both:

Batt charged to full (obviously)

Airplane mode

Wifi off

Bluetooth off

Auto-fetch/push/syncing/etc off

Empty Home screen/no widgets/no live tiles

Comments:

I cant say which will win at this point, the V has shown very consistant battery life for as long as I had it. The VP when I first got it had abysmal battery life, but recently it has shown very good battery life. The entire time I had few apps installed on it.

I dont expect to run them down all the way to 0% as that will likely take 2 weeks, I will likely do it approx a week as I'm currently testing CM7.2 for my S5.

The VP also takes forever to charge! Is anyone else upset by how slow it is? The V can charge from 10 -> 90% in the same time it takes for the VP to do 10 -> 65% (guesstimates).

They both use identical batteries. While it's true that slower charging is better for a battery's overall life, realistically few are expected to keep their phone to the point that the batt charge is the reason to buy a new one.

Table:

Time:	V	VP
13:55:	100%	95%
16:01:	100%	95%
22:43:	99%	93%
25:37:	99%	92%
38:12:	97%	90%
42:57:	96%	89%
60:53:	94%	86%
64:03:	93%	85%
65:57:	92%	85%
73:20:	90%	83%
84:45:	87%	81%
86:53:	86%	80%
89:53:	85%	80%
92:44:	85%	79%
94:16:	84%	79%
96:34:	84%	78%
106:46:	82%	76%

(All times are since last charged)

Conclusion:

I plan on concluding this at ~110 hours as I will be using my venue as my main again.

From the current trend, I can extrapolate thus:

Venue: ~550 hours standby

Venue Pro: ~400 hours standby

Is this realistic? No, not really, it might be due to the way the basebands (as that's what reports the % to the OS) calculates the batt %.

Even 400h standby feels like a streach, as tablets with much larger batts are expected to be in that range.

Regardless, it seems that the V has better battery life. The reason? It's either the drivers themselves or the OSs.

As this is the ODM's 1st WP7 device and 2nd Android device, it could very well be due to the drivers.

[Placeholder for graph, due to be released at completion of test]