"plugged in not charging.." - driver deletion issue!!

I already uninstalled the ACPI driver then reboot several times. But this one time, the battery icon didn't come back. Now, my battery doesn't charge AND loses its icon. Should I buy a new battery? And for the icon problem, how do I fix this?
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64Intel Core i5-2430M4GB RAMNVIDIA GeForce GT 540M
Computer Manufacturer/Model Number
Acer Aspire 4830TG laptop
OS
Windows 7 Ultimate x64
CPU
Intel Core i5-2430M
Motherboard
Acer JM40_HR
Memory
4GB RAM
Graphics Card(s)
NVIDIA GeForce GT 540M
Sound Card
Conexant High Definition Audio
Monitor(s) Displays
14.0" HD LED LCD
Screen Resolution
1366x768
Hard Drives
699GB Western Digital WDC WD7500BPVT-22HXZT1 (SATA)
PSU
100-240V HIPRO AC adapter
Case
Aluminium
Cooling
Internal fan
Keyboard
Standard PS/2 Keyboard
Mouse
HID-compliant mouse
Other Info
ELAN PS/2 Port Input Device
Microphone (Conexant High Definition Audio)
MATSHITA DVD-RAM UJ8A2AS
Back
Top