Originally Posted by IntenseColor
Thanks for responding.
I have tried to install the latest firmware with the LG update tool and the drainage was about the same. I did not install anything else on the device then.
Currently I am on the latest CM7 kang by temasek and baseband version v20s with 420 ril (also v20s daemon, I don't even know what this is).
I'll try battery monitor widget.
The reception at where I live is not so good even with 2g only. But I don't think that's the case becuase I tested with airplane mode activated and have also removed the SIM card.
I had the v20s deamon installed too and I also had a pretty huge battery drain.
So my suggestion : remove it (by installing clean rom again).
As Tonyp already mentioned : try to install an original LG rom with it's default BB en RIL (use NVFlash to flash it). Don't use any other kernels or tweaks. Just the default.
Also don't restore anything (for instance with Titanium Backup or other program).
And set your phone to use 2G only, because a bad reception can indeed drain your battery (and fast too !), because it constantly seeks the network. Setting it to 2G only (it's mostly the strongest signal) can avoid battery drains.
And finally try to recalibrate your battery, there are tools available for that in the Google Play store.