Hi lsavinon,

Welcome to the Community,

Since you're conforming the battery is charging fine and Adapter light always stays on,try going to BIOS (Tap F2 at start up),check under the Main screen if AC adapter is getting detected normally(if it shows 65 watt adapter).

If it shows 65 watt and if you want to get rid of that error message on start up,in BIOS go to Advanced tab,find Adapter warning and disable it.

Note:Once you disable this setting for adapter warning,in future if there is a real problem with the adapter,system will not warn you about any such problem.

Thank You

Hi Sophie,

Please share the exact error message that you are getting from the system. Please check if the charging port on the laptop is loose. Connect an alternate ac adapter to see if that works fine with the system.

Do you see light on AC Adapter? If yes, please follow the below steps:

Please check the status of the AC Adapter in BIOS:

• Restart the system and keep tapping 'F2' as soon as the Dell logo appears.
• Under 'System', go to 'Device Info'.
• Check the status of AC Adapter.

Hello,

I have the same issue as Isavinon, but it doesn't appear to be charging. My laptop is a Dell Studio 1535. I have never had an issue with charging or the adaptor before. This happened when I turned on the laptop for the first time after not using it for 3 weeks..? Any tips would be greatly appreciated.

Sophie

Hi,

I have the same problem where it says the Dell 65W AC Power Adapter cannot be determined even though my adapter is a Del 65W Power Adapter and the little green light is on and on the battery icon it says plugged in not charging. The battery health said normal but that the long-term life was decreasing. I have an Inspiron 1420.

When I went to BIOS it said the ac adapter type was unrecognized device installed. I tried to update the BIOS on the link but it said "Running on an unsupported system!" and only gave me the option to cancel.

What should I do?

Narissa

Try a new Dell OEM adapter.  If that doesn't solve the problem, the power jack or mainboard needs to be replaced.

OK. Thanks

Hi Roshan,

Thank you so much for your reply. I have been facing the same problem, I received a 65 W adapter for my Inspiron 5421 and every time I plug the adapter it gives me the warning.

I specifically have 2 questions :

1. What is the standard wattages adapters given out with an Inspiron 5421. The reason why I am asking is that I got this laptop from the dell store which was in display (as my choice of color for the laptop was on available online) and may be by mistake they gave me the wrong one

2. Incase 65 W adapters are given away, does this reduce the battery life (funny if you would say yes, because I just bought this laptop 2 weeks back). So is it suggested that I invest again and buy may be a 90 W AC adapter ?

Thank you so much for your help

Aatish

Hi Aatish,

Welcome to the Community,

System model Inspiron 5421 is offered with 65 watt and 90 watt AC adapter.If you're system came with 65 watt adapter you need not switch to 90 watt adapter.65 watt adapter will work on your system and it does not reduce the battery life.

Did you check in BIOS (tap F2 on start up,Dell logo),if the AC adapter is getting recognized normally(as 65 watt) or does it show "Unknown"?

Also on the  BIOS screen check and post back the BIOS version.

Thank You

If a new adapter does not fix this then the motherboard may need to be replaced.

Non Dell Adapters will say Unknown and may run the unit but will not charge the battery.

I would not recommend an adapter for the N7110 less than 130W.

Dell P/N: PA-13 PA-4E FAMILY 130 watt 19.5V 6.7A

I am having the same issue but with an Inspiron N7110. 

When I go to Bios - the AC adapter is unknown. How do I fix this?

...and additionally to SpeedSteps advice you may want to test the power jack first before replacing the mainboard.

Inspiron N7110 DC power jack:

I've had an Inspiron N7110 since 11/11/11 and within a week, I had the message about wrong adapter. Dell wanted to replace mobo. No way.

I finally decided to restore to a prior restore point; problem vanished. Luck? Doubt it. Windows autoupdate was going on at 3am or whatever and I assumed that power went to 0% or close enough to abort update. Just a hunch; anyway, problem solved.

Today, same problem. This time I decided to try Safe Mode--you know, start Windows with MINIMAL driver support. After waiting to see if battery was charging, 14% was reported. (I assume THAT driver, if applicable, was loaded and that this wasn't just nonsense.) I then shut down. No further problem.

In BOTH cases, the battery was at or nearly at 0% (3% today).

So DON'T just run out and start replacing things until you try to see if just maybe whatever Dell added to Windows to "check" the battery condition is at fault.

I wouldn't even replace BIOS.

And for heaven's sake DON'T select "ignore battery warnings" in BIOS or allow the Dell message to convince you to agree to quit seeing these messages. You WANT to see that there is or isn't a problem.

Disclaimer: the above is just what MY experience has told me. Anyway, same hardware, problem occurs every year or so. Just keep battery above 10% and you (and I) will probably never have the problem again.

NOTHING'S WRONG with MY hardware--internal or external. Probably not yours, either.

Battery's now at 74% and charging.

@dslomer64

BIOS error messages  - like "unknown adapter" - are usually hardware and not Windows/software related.If this message turns up intermittently you have to deal with a "hidden" hardware problem and in your case most likely a loose connection,which in the worst case could mean to have the mainboard replaced unless you know how to handle a soldering iron.

Respected Sir,

My 90watt adapter is working properly.It's light is glowing all time.But my battery is not responding properly.I don't know what to do.I'm confused.Plz tell me a solution for this.I'm tired of this thing.Plz help.

No - only the latest one needs to be applied.  That said, this is a hardware problem - not a BIOS issue.