Solved Dell laptop won't run on battery even though there is charge

December 14, 2017 at 02:50:13
Specs: Windows 10
I have a Dell laptop Latitude E5440 that will not run on battery. The battery status is showing that it is 87% charged, but that is not charging. I tried a couple of different power supplies suspecting that the issue lies there, but get the same result - if I disconnect the charger the laptop switches off. I have run the Dell diagnostics and it shows everything is fine. I don't want to go off and buy a new battery if that isn't the problem. Typically the laptop is about 6 weeks out of warranty.

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✔ Best Answer
December 18, 2017 at 09:35:15
Hi John,

Battery life is like asking 'how long is a piece of string?'

Here in the UK replacement OEM Batteries can be found for under £10, with 1 or 2 years guarantee.
.
Do not choose the cheapest, but preferably one with a greater (never less) wattage then the original.Stick with 6 cells.

Even if they fail after around a year or so, you have had your monies worth.

Good Luck - Keep us posted.

message edited by Mike Newcomb



#1
December 14, 2017 at 05:13:18
It does boot OK without the battery installed - using the power adapter/charger only?

A "very" long shot...

Remove the battery; clean its edge connectors with soft pencil type eraser; wipe the edges afterwards with a lint free cloth (even a kleenex tissue).

Re-install the battery - firmly. Then remove and re-install again - firmly.

Then see if things improve - both on battery only, and also when "charging"...

It's not unknown for batteries to fail over time; but if the unit is only about a year or so olde that is a little premature for my thinking...

The chargers you used to test - did they run the laptop OK regardless of battery issue? What was the current spec for those chargers? You need to ensure any charger is providing the correct volts and "at least" the same current as the one that came with the laptop. If the current output is higher - fine.. But the volts must be as per the Dell spec'd charger.


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#2
December 14, 2017 at 05:34:13
Hi trvlr,

I tried that, but no change. The system is actually 3 years old, so perhaps hoping that the battery is still good was a bit optimistic. I have carried out further diagnostics from start up and that is reporting the battery is at end of life, so it looks like the OS is only telling half the story.

New battery it is!!

Cheers


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#3
December 14, 2017 at 06:04:36
mmm Batteries seem to be a variable feast... My 2005 Acer Aspire (still going strong but re-installed a few times with XP-Pro) still has the original battery. Power adapter been renewed twice - after the original failed cable intermittent at laptop end. Found it wise(r) to buy slightly higher priced adapters as the cheaper tend to run a little warm - cheap construction and components pushed to their limits.

What happens if you can let the battery die down to zero volts - will it do that? Then see if it will recharge fully? I seem to recall someone here (possibly fingers or riider?) who was into battery technology; and who advocated/suggested to let a battery go flat occasionally and then recharge fully. That appearing to resolve similar problems to the one you describe?

Some advocate removing the battery when not required; but to recharge it at intervals as above, even if not used in general. Others say leave it in and run it flat from time to time; then recharge etc..

Presumably the laptop does boot ok with the adapter in (and active/alive of course)


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#4
December 18, 2017 at 09:35:15
✔ Best Answer
Hi John,

Battery life is like asking 'how long is a piece of string?'

Here in the UK replacement OEM Batteries can be found for under £10, with 1 or 2 years guarantee.
.
Do not choose the cheapest, but preferably one with a greater (never less) wattage then the original.Stick with 6 cells.

Even if they fail after around a year or so, you have had your monies worth.

Good Luck - Keep us posted.

message edited by Mike Newcomb


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