PH315-51-78NP new battery not charging.

Hi everyone,

So today I replaced the battery of my ph315-51-78NP because the battery had gone bad. The battery I replaced the old one with is a new original battery.

When I hook up the charger while the laptop is turned off, the charge light comes on but the moment I turn on the laptop I hear a beep that sounds like a bios beep and the charge light turns off. Once windows loads it does not show the charger is connected. If I then unplug the charger from my laptop and plug it back it, nothing changes and charge light stays off.

If I unplug the charger from the laptop and unplug the charger from the outlet and then first plug the charger back int the outlet and then plug it into the laptop, I again hear the beep that sounds like a bios beep, the charge light comes back on and windows now registers the charger having been plugged in but still does not indicate it is charging. Has any of you had a similar issue and was able to resolve it?

Hardwareinfo64 indicates that the battery is being charged but the values are way too low for a real charge. 14.416V instead of 19.5V and 4.545W instead of 180W.

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StevenGen

https://community.acer.com/en/discussion/673490/ph315-51-78np-new-battery-not-charging

You should not be having tese problems or any problems if you replaced the old battery with a new battery, as from the HWiNFO stats, your battery is the proper specs battery and charging and working properly. The PH315-51 battery should be of the following specs:

Chemistry: Li-ion

Battery Cells: 4

Volts: 15.2V or 15.4V

Capacity: TYP.3220mAh/48Wh

It could also be inside your PH315-51 internal circuitry power stages that are shortening out or are damaged and that is shortening your charger out, as charger/adaptors have a turn off safety switch and if anything related to charging and/or its plugged in, the charger/adaptor turns off, so those signs could also be from that? Also check the charger/adaptor if its output voltages is up to spec. Good luck and hope this helps you out.

William_mk2

@rick86

Try to use it with an alternative or new charger.

I am really sorry for the inconvenience.. Let us do the basic steps first..

Doing the power drain and bios defaults will really help. Kindly follow the steps given below:

Turn off the laptop. Disconnect or unplug the charger cable, devices or any other cables connected to your laptop. Close your laptop. Turn it upside down. On the bottom of the laptop, you can find a pin hole. It is a tiny hole. You can a find a battery symbol indicator next to the hole. It is like a + and – sign symbol as though somebody is trying to shift the battery out. Insert the pin on to the hole for 30 seconds. Remove the pin. Flip the laptop. Connect the charger cable, turn on the computer. Only on laptops where the battery is inbuilt you can find the battery reset hole on the back of laptop.

If you don’t find a pin hole on the back of laptop then you might be using removable battery. There is no need to unscrew anything to remove the battery. Turn off the laptop. Disconnect or unplug the charger cable, devices and any other cables connected to your laptop. Close your laptop. Turn it upside down. On the bottom of the laptop, please look at the top or bottom depending on the way you look at it. You can find a long door. It is a battery removable door. Just below that you can find a latch. If you move the latch you can remove the battery door. Once the battery is removed, flip the laptop. Open the top cover, press and hold the power button for 1 minute. Connect the battery back on the back of computer. Connect the charger cable back and then turn on the computer.

If you don’t see a reset pin hole on the back of laptop or if you are not able to remove the battery (if it is inbuilt) then please unplug all the cables and devices out of laptop. Hold the power button for 1 minute. After releasing the button you should wait a while before plugging in power. Just because the button has been pressed doesn’t bleed off all the residual electricity on the motherboard. Wait 15-30 minutes before plugging in power. Then once power is connected wait for a full battery indication before turning the system on. That allows the battery to fully reset it’s internal statistics.

Connect all the cables back and restart the computer.

While turning on the computer, tap f2. It will go to bios. Press f9 once. It will show load bios defaults with a yes or no popup. Press enter. Popup screen will disappear. Press f10 once. It will show save changes popup with yes or no. Press enter. Computer will restart and it will load into windows.

It might also be the issue with battery, charger or power outlet. Try to use the charger in a different room on a different power outlet. Try to bypass the surge protector and connect it directly to power outlet. Try to use an alternative charger if possible. Try to turn on the computer without the charger and check it ( as long as the battery is not drained out )

Try windows x

go to device manager

expand Battery

right click on all the items below battery – uninstall

Restart the computer

It should work fine..

William_mk2

@rick86

I will also help you to get the old battery to work properly.

Please remember these steps might help you to get the old battery back to working state..

It's likely the battery meter needs to be recalibrated. If your AcerCareCenter does not have the option to calibrate the battery meter, follow these directions

With the laptop turned off, connect the AC adapter and wait for the battery charge LED to turn from solid orange to solid blue.
Turn the machine back on.
Disconnect the AC adapter.
Use battery power until the battery-low warning appears.
Reconnect the AC adapter and fully charge the battery again.
Follow these steps again until the battery has been charged and discharged three times.

rick86

@William_mk2 and @StevenGen

Looks like StevenGen is correct.

I have tried all the battery reset methods etc. (removing battery physically, pressing power button for 30sec. and leaving for 30 minutes before turning on. Using the battery reset button. Leaving the computer to charge over night. etc)

Battery just is not charging, it can provide power to the system, but can't be charged. Battery is definitely new, original and in good state. Looking at the schematics, the only things involved in charging the battery are 3 0805 EMI suppression ferrite beads and 1 charge IC. The laptop does turn on using the ac adapter meaning that the part of the charge IC that sends power to the rest of the board is fine. Thus it seems that the charge IC (ISL88739AHRZ-T) has a short in specifically the charge part of the ic.

Unfortunately the acer authorized service center in my country does not have this chip in stock and confided that obtaining the chip from acer warehouse will most likely turn out to be quite expensive. Mouser and other USA based suppliers I found only sell the IC with a minimum order quantity of 6000 pieces. So it looks like I will have to be at the mercy of suppliers in Hong Kong in order to purchase just 3 chips. (3pcs to make sure at least 1 works properly.)