Power Manager Doesn't Show Battery Percentage on Compaq CQ61

[Krishna]

Binary package hint: gnome-power-manager

Neither in Natty. Battery percentage is not shown by power manager. It just shows estimating.
I have attached the screen shot.
Also sometimes the (estimating..) appears twice when clicking on the battery icon..

I have been experiencing this problem from 10.04 onwards. Only Lucid version works properly for me...

I have been using this by Forcing the gnome-power-manager in previous versions.
I am not able to downgrade package in natty...

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-power-manager 2.32.0-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
Date: Sat May 7 12:45:30 2011
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GnomeSessionSuspendInhibited: No
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: Hewlett-Packard Compaq Presario CQ61 Notebook PC
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=ee554ae6-c5f9-4080-b0ea-c96b18eb4d4f ro quiet splash vt.handoff=7
SourcePackage: gnome-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/22/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.14
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 3069
dmi.board.vendor: Quanta
dmi.board.version: 21.12
dmi.chassis.type: 10
dmi.chassis.vendor: Quanta
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.14:bd09/22/2009:svnHewlett-Packard:pnCompaqPresarioCQ61NotebookPC:pvrRev1:rvnQuanta:rn3069:rvr21.12:cvnQuanta:ct10:cvrN/A:
dmi.product.name: Compaq Presario CQ61 Notebook PC
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard