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January 25th, 2023 09:00
Precision 7740 Battery Problem?
Dell Precision 7740
About FIVE WEEKS out of warranty. So PERFECT timing for things to start failing!
At the moment, I have a power issue… Laptop has been off, and in the case for a week or so. Pulled it out and tried to boot it. DEAD, NOTHING.
Plugged in the power supply, and it booted fine.
Within two minutes it indicated the battery was fully charged – 100%. Unplugged the power supply and it dropped to 97% but worked fine. Rebooted and it came up and said it had SIX percent, then shut itself down. Plugged in the power supply and booted it, and it showed 6%, and that it would be FULLY charged in a couple hours.
Power went from 6% to 11% in a couple minutes, then instantly shot to 100% again. Unplugged and it’s gone down to 80% in something less than 30 minutes.
Tried technical support, but all they wanted to do was have me update the BIOS, then buy a new battery...
Did the $150 battery die a month after the warranty expired?
filbert
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January 25th, 2023 09:00
Your laptop is two to three years old, so the battery may be near end of life. That would be consistent with the symptoms you describe.
Open an Administrator CMD prompt (CMD, run as Administrator).
Paste this command, and then press Enter:
powercfg /batteryreport
That will show a figure for the designed battery capacity (when new) and the current capacity. Post results here.
You can also run Dell Diagnostics:
Immediately after pressing the power button to turn on the laptop (or after clicking the Reboot command), press and hold F12 to enter the One Time Boot Menu, select Diagnostics and press Enter. The Dell Diagnostics will test major hardware components.
Also, it's worth trying a reset:
GAllen5895
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January 25th, 2023 13:00
I did the battery report earlier. It says Design Capacity: 97003 (as I'd expect). Full charge capacity 65892.
Interesting... The 6-year-old Alienware 17R3, which has had a lot more use, charges, discharges and such, is on the original battery and works well. The 7740, 3 years and a month out of warranty needs a battery?
I'll try a reset and see what happens.
Worst case, I'll buy a replacement battery.
Ahmed Aref
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December 24th, 2024 23:05
@ GAllen5895 Is the problem solved? Please reply How was the problem solved?
GAllen5895
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December 25th, 2024 01:41
I did all the steps above. No difference. If I'm in the BIOS, there's no problem. Keyboard works fine. I finally found a recommendation online to rapidly and repeatedly press sets of two or more keys, all the way through the keyboard. That IMPROVES most of the keys and slightly improves a few, but there are still keys that are wonky.
Most of the time I use an external keyboard since this one isn't reliable.
It's disappointing.