Can't log into windows while running on battery

[Its_Frenchy]

I picked up a used Dell Latitude E6430 at an auction. It had a battery that was shot. I ordered an aftermarket replacement from Amazon. I put the battery in and it worked normally, charging, running the laptop with AC disconnected, etc. The problem I have run into is that when I try to boot from just the battery, even when fully charged, I will get to the login screen, enter my password and the laptop with crash and shut off (no power at all) just as windows begins to load. I can boot and load with the AC adapter connected just fine. Running Windows 7 Pro from an SSD. I have tried the following things to try to fix the issue but nothing has worked thus far-

Updated bios and E6430 drivers through Dell Support website.
Downloaded and installed all available Windows updates.
Reset power by removing battery, AC adapter and hold power button for 30 seconds.
Disabled Dell rapid charge in the bios.
Uninstalled Microsoft ACPI-Compliant Control Method Battery drivers and reinstalled.
Cleaned the contacts in the battery compartment.

Any insight or ideas would be greatly appreciated.

 

[rgd1101]

MERGED QUESTION
Question from Its_Frenchy : "Laptop won't log into Windows while on battery power"

I picked up a Dell Latitude E6430 at an auction last week. It was missing the battery. I ordered an aftermarket replacement from Amazon (Futerbatt 9 cell). I put the battery in and every thing functions normally. Battery charges, laptop runs on the battery with AC disconnected, etc. But... when I try to boot the laptop on the battery alone I run into an issue. It will boot, I can enter my password to log in but then it immediately shuts off just as windows begins to load. I can boot and log in with the AC adapter connected just fine with the battery connected or not. I am running Windows 7 pro and have tried the following things so far without any fixing the issue-

Power reset by removing battery and AC adapter and holding power button for 30 seconds.
Updating Bios through Dell and all Windows updates.
Uninstalling the Microsoft ACPI-Compliant Control Method Battery drivers and rebooting.
Checking Bios settings and disabling Dell rapid charge.
Cleaning the contacts in the battery port.

I'm at a loss. Do I just have a bad battery? Or is it more likely a software issue? Any ideas or insight would be greatly appreciated.

 

[USAFRet]

I picked up a used Dell Latitude E6430 at an auction. It had a battery that was shot. I ordered an aftermarket replacement from Amazon.

You may have bought a crappy battery.