[Droid 2 Global General] jsmith45:
The processor could definitely be a part of it, but there is one other major difference between the Droid 2 and the Droid 2 Global that could account for a D2G draining battery faster than an identically configured D2. Namely the "Global" part of the Droid 2 Global.

The phone has two different Cellular chips, often referred to as "basebands", but being as "baseband" is a shortening of "cellular baseband processor" which is actually only part of the chip, I prefer the term "cellular modem", since the chips look to the main processor much like a cellular modem does to a PC (indeed they are often exactly the same chips).

One of these cellular modems is a 3GPP2 family modem (supporting CdmaOne CDMA2000 1xRTT, CDMA2000 EVDO Rev.A), which is the one used in the united states by Verizon.

The other cellular modem is a 3GPP family modem (supporting GSM, GPRS, EDGE, WCDMA (a.k.a. UMTS), HSDPA, and HSUPA). That is the one that that is used internationally, as very few countries besides the US have cellular providers that use 3GPP2 family standards.

Now back to the battery life. It will probably not surprise you to find out that having both Cellular Modems running, will use more power than just running one of them. So turn off the one you are not using. I'm guessing you live in the US, and are not using the GSM one.

To turn off the one you are not using follow the steps in the following video, except you will not be choosing global mode.

[YOUTUBE]pHCWP0ZLTYo[/YOUTUBE]

In case you don't want to watch the video, the steps are:

Go to the home screen.

Push the menu key.

Choose settings.

Choose Wireless & networks

Choose Mobile Networks.

Choose Network modes.

Select the correct option.

Now, which option is correct? Well that depends on how many options are in the list. There will either be 3 options, or more than 3 options. Unmodified phones will have only 3 options as fair as I know.

If you have three options, they are "Global" (Both modems on), "CDMA" (The one you want is the US), and "GSM/UMTS" (the one you want elsewhere).

If there are more than 3 options, for the US you want "CDMA / EvDo auto" for the US, or "GSM / WCDMA auto" elsewhere. "But wait", you ask, "What are the other options for?" Well, they let you choose to never use the 3G protocols, or only ever use the 3G protocols. They are not likely to be useful to most people, which is why the unmodified phone only shows 3 options.

Believe it or not, that would not really be underclocking. The processor turns its speed up or down based on temperature and use. TI calls this "Smart Reflex" technology. The processor in most laptops also does this, but Intel calls it "SpeedStep", and AMD calls it "PowerNow!".

The minimum speed for the Droid 2 Global is 300 MHz, and the maximum is 1.2 GHz. All you would be doing is telling the CPU not to go all the way to 1.2 GHz.

Actual under-clocking would imply the ability to run lower than 300MHz, which you probably don't want to do.

As others have pointed out the tool you use to set a minimum or maximum speed is called SetCPU. Unfortunately it only works on "rooted" devices, so you would need to "root" your phone first.