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Battery charging/laptop Put new battery in laptop...only charges 84%

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The battery may be getting old/depleted OR some of the cells in the battery may be dead/malfunctioning.
The battery is probably still worth using for a while yet, though it will last a much shorter time than usual.
Alternatively, you could get a new replacement battery.

A remote possibility is that you are using a wrong charger for the laptop - it does not supply enough power to the battery. Please confirm it is correctly rated.
All the best!

Posted on Jan 30, 2009

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I have a 84 d15 dodge. the battery won't hold a


Sounds as if you have a short draining the battery overnight. Take the battery negative off and run a 12volt test light between the terminal and the ground post on the battery. leave the key out of the ignition switch. see if there is a dim or bright light glowing in the test light. If either one is the case start pulling out your fuses and watching the light until the light goes out. When it goes out y have identified the circuit your short is in. ( headlamps, door switches, ect. ) Make sure to put each fuse back in the proper place so as not to burn anything up!!!!. By the way , you did NOT keep the positive battery terminal off to see if the alternator was charging did you? If you did you just burned up your new alternator,which by the way will give your battery a direct short to ground through the diode trio in the alternator, thus causing the battery to very quickly drain. and Why should you have to jump start a NEW battery? Check to see if you are lucky enough to have a charging fuse, if you did the positive off while running thing that fuse could save you if you have it.

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When i have my laptop plugged in it says its charging. it still would say its charging but it doesnt go any higher then 84%.


First of all, you need to make sure your power adapter is providing enough power to both run the laptop & charge the battery. A very good way to do this is to compare your laptop voltage & ampere requirements (written on a sticker on the bottom of the laptop) with the voltage & ampere ratings of the power adapter. Voltages should be the same, or the power adapter's voltage about up to 0.5 volts more than the laptop's voltage rating. Amperage of the power adapter should be at least equal to or greater than the laptop's rating. It should never be less than the laptop's rating, or else the power adapter will be providing insufficient amperes to charge the battery. Of course, the power adapter's nominal amperage might be ok, but it degraded on usage. You can verify this by testing using a good or new power adapter.
If the battery did not charge using the new power adapter, take the battery off the laptop, & using a dry tooth brush, scrub in between the fins of the battery connector on the motherboard & on the battery it self, then put the battery back into the laptop & try again.
If this still did not resolve the problem, then the battery itself could be bad. Try it on another laptop, or try a good or new battery in your laptop.
If this did not work, there might be a possibility that the charging circuitry on the laptop's motherboard is defective & needs servicing. In order to do this, the laptop needs to be disassembled & the motherboard checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether

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If the battery will not charge or only has enough for a few minutes or less of power then it is (past) time to replace it with a new one. Depending on how you use and charge expect about 2 years of usable life out of a battery. They seem to make most of these just before quiting time on a Friday so they really don't last. I do have a couple of laptops I use both on and off the charger that are much older than that
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First check if it might be replaced under warrenty. OEM or Store purchase warrenty's cover this.

If its coming out of your pocket it really pays to shop around. I was replaced one a week ago and was quoted $84 to $176 in town. The higher prices were from computer stores and were saying a week to get it in. The $84 was a battery store and was in the next day.

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Often this fix it.

Good thing to do to extend battery life esp if the laptop is pluggin alot.

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Portable batteries are a consumable item and have an average lifespan of 300 to 500 recharge/discharge cycles.

If the computer is only 10 months old, contact HP for a replacement after following the instructions for the HP Battery Check HERE

http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&dlc=en&product=1149451&docname=c00625471#N859

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