After looking around, it seems the Dell Inspiron 2500 AC Adapter contains a proprietary 1-wire device that transmits a serial number to the laptop. This is meant to prevent you from using 3rd Party adapters, only using Dell ac adapters. However, the chip and communications are very prone to breakage, which is what seems to have happened in my case. This is not an isolated incident.
Thankfully, it’s still in warranty. A replacement is arriving tomorrow. Congratulations to http://www.usadapter.com on getting a replacement to me quickly, but I am disappointed that Dell has made the laptops only compatible with their own Dell Inspiron 2500 AC Adapter by use of the proprietary 1-wire device inside the Dell ac adapter.
So you should know some knowledge about Dell Inspiron 2500 AC Adapter safety and usage tips.
Dell Inspiron 2500 AC Adapter (http://www.usadapter.com/
Brand: Replacement
Weight: 444g
Dimension (LWH): 3 Hole Tip
Dell Inspiron 2500 AC Adapter Description:
Input: AC100-240V (worldwide use)
Output: DC20V 3.5A
Power: 70W
Outlet: 3-prong
Connecter size: Special 3 hole tip
Item Includes: AC Adapter and Power Cord
Performance:
Condition: new
100%OEM compatible, guaranteed to meet or exceed OEM specifications!
Dell Inspiron 2500 AC Adapter Porduct Warranty
12 months warranty

