A lot of sellers list various chargers as being compatible with the Dell M6400 in our view simply to get more hits to their listings.
And if it is not to get more hits to their listing the they are totally incompetent listing correct items.
The Dell Precision M6400 requires a 150 watt charger as a minimum.
Although other chargers will power the laptop the bios willl show a warning message saying the charger is now powerfull enough and a minimum 150Watt charger is required.
A lower wattage charger will therefore not charge the battery. I have tested this with multiple low wattage chargers 90 Watt etc.
Looking for a charger for my personal M6400 I came a cross numerous sellers listing basic 90 Watt chargers as being suitable for a Dell M6400.
This is totally incorrect.
We hope this helps you to safe time as well as money and the usual headaches ordering the wrong item.
So many listings regarding this item are totally incorrect and I therefore might be better of ordering direct from Dell.
It might cost more a little more. But at least I know I get the correct charger, and saves me a lot of time browsing through Ebay to find the correct listed charger for sale
In case you are still not sure this is the part you need for your Dell Precision M6400
Manufacturer Part numbers 450-12893
Dell Part Number : 450-12893
Compatible with: Alienware M17x / Dell Precision M6400 /M6500
Or Manufacturer part Number : CN072
Dell Part Number 330-0722
Compatible with: Dell XPS M1730 / Dell Precision M6400
Information simply copied from DELL website
And now for a little irony
We have found one seller on Ebay selling this part number in a COMPATIBLE adapter for more money then buying the ORIGINAL DELL adapter directly from Dell
Show it pays to do your homework.
The advertising to the right of this review is placed by EBAY and not by us
We found it important to mention as most of the advertising is completely irrelevant to the review.
Most importantly if Ebay lists adverts for laptop chargers for the Dell Precision M6400 that are not even compatible it totally defeats the objective of this review.