HP Probook battery issues

HP ProBook 4540s running windows 10 had battery replaced last july and had started having battery issues again.

both in july and currently the machine will shut down very quickly when running only on battery even though battery is fully charged.

i am going to run bios diagnostics on the machine as soon as i can schedule a time with the user but wanted to see if there were any other suggestions as well.
Dawn Marie StanfordOperations CoordinatorAsked:
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JohnBusiness Consultant (Owner)Commented:
Is the user leaving the laptop plugged in essentially non-stop (including overnight)?  This can fry the battery.

Open Task Manager, set to Hide when Minimized, and minimize it. It is now a green square icon in the system tray. Is it dark green (0 CPU) or mostly bright green (high CPU). The latter wears out a battery.

Find the battery icon in the System Tray and watch it. You can double click on it to open it. Is it going down fast?
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Dr. KlahnPrincipal Software EngineerCommented:
Laptop battery packs have a definite lifetime, but it's not measured in months or years.  It's measured in discharge-recharge cycles.  The more a battery pack is used and recharged, the shorter its lifetime will be.  A pack that might last six years in a machine used weekly might last six months in a machine that runs the pack down each day and needs a full recharge.

A battery pack can show "fully charged" and yet not have any usable capacity.  The laptop determines charge level not by the number of coulombs transferred into the battery (which is the proper method), but instead by the battery pack voltage.  So a battery pack can have a very high internal resistance and be very close to unusable, but still show a proper "full charge" voltage.

In this case it sounds like one or more cells are failing (or have failed) and the pack is again due for replacement.  If you're short on cash and have a mechanical inclination you can crack open the pack casing (sometimes near impossible to do without ruining it), test each cell and replace the individual bad ones.  Otherwise, safest and easiest to just buy another one.
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Dawn Marie StanfordOperations CoordinatorAuthor Commented:
thank you gentlemen.

is there anything else that can be damaged by battery issues?

replacing the battery is a fine solution for me.

just want to make sure i don't miss any other potential issues.
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JohnBusiness Consultant (Owner)Commented:
If the battery is working properly and the computer is working properly, it will not be damaged by the computer. Only constant overcharge will fry it.

Proper use (use on battery until low, charge fully, repeat should result in the battery lasting about 3 years.
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Dr. KlahnPrincipal Software EngineerCommented:
is there anything else that can be damaged by battery issues?

Well, being lithium batteries the entire pack can catch on fire and burn almost explosively, but fortunately this does not happen often.
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dbruntonCommented:
>>  Both in july and currently the machine will shut down very quickly when running only on battery even though battery is fully charged.

Time frame that it takes to close down?
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Dawn Marie StanfordOperations CoordinatorAuthor Commented:
this morning it was fully charged and shut down in about a min after i had it logged in.
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JohnBusiness Consultant (Owner)Commented:
The battery may have been defective and may have been damaged by leaving on charge all the time. Those would be the two main reasons.

HP ProBook 4540s running windows 10 had battery replaced last July  <-- I assume it was an HP OEM Battery.
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dbruntonCommented:
>>  I assume it was an HP OEM Battery.

That, definitely needs to be verified.

>>  This morning it was fully charged and shut down in about a min after i had it logged in.

Any temperature warnings?  (Don't expect any but doesn't hurt to check).

Will it start up again after, say 5 minutes, and close down again?
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nobusCommented:
try the battery info view :  https://www.nirsoft.net/utils/battery_information_view.html
you can also take a fully charged battery - and remove the AC - then note how fast it empties

and normally - depending on the country - you should have a warranty replacement too !!
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dbruntonCommented:
Comments answer the question.

More for John as I feel he has definitely help answer the question with his supplementary comments.
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