"Consider replacing your battery" problem Windows 7

[Xylem]

I'm experiencing a problem where my battery icon on my task bar has a red cross on it whenever I hover over this icon is says, "Consider replacing your battery". I just received this error just half an hour ago after doing a Windows update. I haven't experienced any problem with the battery life so far, it seems pretty normal. I'm not sure if I should actually replace the battery or maybe it's something to do with my drivers.

I have an ACER ASPIRE 5745G
4GB RAM
Intel Core i7-740QM
NVIDIA GeForce GT 420M with 1GB dedicated memory.
and a 6-cell Li-ion battery.

I rarely stop charging my laptop, I usually leave it on charge unless the laptop is off or whenever I'm not gaming.

[bohb]

Is the battery old? As batteries age, they lose the ability to hold a charge, and if it reaches a certain threshold, the BIOS will start warning you about it (Windows reads this information).

There's nothing to be concerned about, other than reduced battery life.

[Xylem]

I've only had this laptops for about 3-4 months.

[Zeonred]

Leave the charger in, and take out the battery if you're concerned about it.

[Murk]

Having the laptop plugged in at all times can greatly reduce battery life. You should try installing [url=http://osirisdevelopment.com/BatteryBar/]Batterybar[/url], it'll show you exactly what state your battery is in (Battery wear)

[bohb]

[QUOTE=Murkrow;30717625]Having the laptop plugged in at all times can greatly reduce battery life. You should try installing [url=http://osirisdevelopment.com/BatteryBar/]Batterybar[/url], it'll show you exactly what state your battery is in (Battery wear)[/QUOTE]

Uh, what. Leaving the laptop plugged in at all times greatly increases battery longevity from lack of discharge and charge cycles.

If the laptop is new and the BIOS is reporting a weak battery, there's either a problem with the laptop motherboard, or the battery is defective. Since it's clearly under warranty still, I'd RMA the battery first and see if a replacement fixes the problem.

[Deunan]

Well he could try doing a few complete cycles to calibrate the batteries. If he hasn't done that in a while it could be reporting completely insane values to ACPI