I purchased an Asus U52F 14 months ago
The original battery had weakened to the point of lasting for less than 1 hour per use. I ordered a new battery. I took the information off the existing battery (A42-U53). 14.4 V.
The only difference that I can tell is that the new battery is listed with a higher mAh (5200 versus 4400). This is the battery I purchased:
Asus A42-U53 Battery 75Wh, 5200mAh (Extended Capacity) from Powerwarehouse through Amazon.
The battery seems fine. Installed and charged, it gave me about 5 hours of battery time. When I plugged the notebook back into AC power, the battery recharged to 100 %.
The next day, I noticed an orange light flashing on the front of the unit. I recognized it as the power light, but had never noticed it flashing before. When I placed the mouse cursor over the battery icon, it read "98% available, plugged in, not charging". I powered down the unit, and then powered it back up. No change.
I then powered it down, removed the battery, then reinserted the battery.
Upon powering the notebook back up, the icon now showed the message "76% available, plugged in, charging", just as it normally would after usage on battery power.
The next morning, I used the notebook on battery power for a short time (10 minutes or so). I later noticed that again, the orange light was flashing and the message was the same as the day before.
I went through the same procedure, removing and replacing the battery, with the same result as before, except that now the message read "97% available, plugged in, charging". (This only seems to happen when I've had the notebook on battery power for a very short time, compared to hours.)
It's as if the battery must be removed to trigger the charging.
The following day, I used the notebook on battery power for most of the day. When it reached 10% remaining power, I plugged it in to AC power. The battery charged normally.
Yesterday I once again removed it from AC power twice, each time for just a few minutes. The
battery icon showed 96% power. Later in the day, I noticed the orange light flashing again. I removed it from AC power and used it on battery until it powered down (my critical stage is set at 5%). When I plugged it back into AC power, the light was still flashing. I powered it down, removed and replaced the battery, and everything was fine.
I'm new to the forum and I saw an older thread on recalibrating. Is that what I need to do? If so, can you tell me exactly how? Do I set the critical stage to a lower level and simply let the battery run down? Or do I do it through the BIOS? Is it possible I recalibrated it yesterday by letting it run the battery down to 5%? I would appreciate any help.
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Set the critical stage to something like 10 or 5%, let it drain, when the laptop shuts down, reboot and go into the bios, let it drain from the bios until the battery si dead for good. Once it is, plug it in and pwoer it up again. Note that this will only work if your battery isn't on it's way out, if the battery is on it's last leg, there's always a remote possibility it will not charge anymore.
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Thanks, I'll try that. I'm assuming when you reboot, it's necessary to have it on AC power at that point (or it wouldn't reboot)? Then the BIOS will prompt me from there? (I haven't used the BIOS on this notebook before).
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When windows shuts the laptop down due to low battery, don't plug it in just yet. Turn it on and press F2 to enter the bios.
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as to your question on why it doesnt charge, some of the asus notebooks have the hybrid power software, which prevents charging until the power level reaches below 94 % ( i think) same thing happens to me, i just unplug, wait a little, adn replug it in if i want to get 100 % charge
Asus Battery Recalibration
Discussion in 'Asus' started by Yuma Tatter, May 13, 2012.