Ultra-slim Battery Not Working (Flashing Battery LED)
Product: EliteBook 2740p
Operating System: Microsoft Windows 10 (64-bit)
I recently purchased a used EliteBook 2740p and was disappointed at the battery life (probably due to years of use on the battery), so I decided to buy an Ultra-slim battery to maximize my battery life. Today, it arrived in the mail and I plugged it in only to find it doesn't seem to work.
When I plug it in with the internal battery still installed, the battery (lightning bolt) LED starts to flash amber and for the most part, does not stop until I remove it. In Windows, the internal battery shows up as "Battery 2" and reports nothing installed for Battery 1.
If I only have the external battery installed, the computer will not power on without the power adapter plugged in, and the computer reports no batteries installed.
I have tried resetting the computer as instructed by another post on here (unplug power and all batteries and hold the power button for ~20 seconds), but that did not help.
I can't find any kind of battery diagnostic tests within BIOS settings so I'm not really sure if this is an issue with the computer or the battery. I bought the battery used but the seller guaranteed it was tested and that it worked. Do I need to use the docking station to charge it? My guess is no since it has its own battery connection, but I can't really find much information about it. There is a button on the front of the battery with a battery icon on it but it doesn't seem to make any difference (I've tried both tapping it and holding it down).