Id say defective. Mine rarely ever gets hot.

 

Here's Motorola's response to that,

"It is possible phones will become warmer during heavy use. This is normal behavior especially if you are transmitting data, talking for an extended period of time, or playing games or music on the device. In these conditions, the phone is transmitting and utilizing alot of power on the device which will generate heat. "


https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/51806/~/droid-2---gets-hot-during-use-or-when-charging-the-battery.

 

As for charging they say,

If your phone is getting hot while charging, you should immediately disconnect the charger from the wall and the phone. Please follow the steps below to troubleshoot the issue:

1. Try plugging in another charger if one is available and see if the issue persist. If the charger is defective you can process you should discard immediately or process for a warranty return if still under warranty.
2. Remove the battery door and battery from the device, inspect the battery and battery connections. Ensure there is no damaged to the battery, battery pins or contacts on the device. If you have damage to the battery or charging pins, please discontinue use and submit the phone for repair.
3. Check to ensure the battery and charger are Motorola Original Equipment. While other 3rd party batteries and chargers may fit the device, they have not been certified and tested to Motorola's high standards and could damage your device.
4. Inspect the phone to ensure there is no signs of liquid damaged that may have damaged the electronics in the phone. If there are signs of liquid damage please remove the battery from the device and seek a replacement unit from your authorized carrier. It is important to note that Liquid Damage is not coverred under the Motorola Limited Warranty and that phones that have experienced liquid damage will not be repaired and will be returned by unrepaired.

https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/51806/~/droid-2---gets-hot-during-use-or-when-charging-the-battery.

 

Hope that helps

 

Its not defective. This is just poor design. You put a 1ghz cpu in something as small as the droid2 you are bound to have heat problems.