Would the Cydia app 'Insomnia' drains the battery?

Hello Lowyat people!

I have an iPhone 2G with me, and my iPhone cant seem to charge more than 30% using a USB Charger. I dont have the wall charger because I lost it. The iPhone was working normally a day before, when I cant find a spot to charge my phone so I left it until the phone battery dries flat. The next morning I tried hooking up to a computer, and it wont charge. I was stuck on the red battery screen for a full day and its still cant charge enough to boot the phone. All of a sudden it charge and boot up the phone somehow, now when plugged into the charger it will sometime go from 23% back to 18% then went up again to 22% and so forth but definitely wont reach more than 30%. The battery drain in some cases can drain 1% in 5 seconds!

I've already updated my phone from previous 3.1.2 to newer 3.1.3, did a restore and everything. It doesnt work.

I need to know if anybody faces the same problem, it is the battery's problem ( I need to replace ) or most of the time is the charger itself? I'd really appreciate if someone can help me out

meaning a full charge will takes 4 hours?

hi all, 1 noob question please . everytimes i charge my 3gs until it show battery 100% then i off the charge. is this correct way ?

Hi Guys,

I think I m experiencing battery drain as well. Normally i charged my phone fully before I sleep that will be about 12am...

Then whenever i get up..i should still have about 97% at 6am

However, nowadays I only have 93% despite turning everything off.

And on average day time with hardly any usage, my battery drains at a rate of about 7-8% / 2 hours....is that normal ?

i have a 3G from canada...i've been tryin to unlock it but it failed...do u think he got any idea in gettin it fixed?? 

will replacing the battery manually void the warranty?