Normally if the battery is going to fail it will do so fairly early on, so you may have a bad battery.
Originally Posted by 14Kizzle
The comment to charge the device as often as possible is VERY good advice. These Lithium-Ion batteries don't develop memory issues and if fact they like to be charged-up, so charging it often is good.
Although a few people do seem to get more than one day of use from a battery with minimal use, many of us don't. I tried a number of things including different batteries to no avail and ended up purchasing the Seidio 2600 mAh extended battery, for me, problem solved.
Here are a few things that you might want to try, after you get a new battery from vzw:
In case you are wondering why 1 & 2 above, it is because in circumstances where your signal is not real strong the phone will start searching for a better signal, this consumes lots of battery power. By setting the device to 1XEV you are telling it to only search for CDMA signals and to ignore the GSM signals, this takes some of the strain off of it. By removing the SIM card you simply avoid a question each time you reboot asking if since you have this SIM card in your phone wouldn't you like it to change the setting back to Global for you.
- Set your network technology to 1XEV instead of Global.
- Remove your SIM card and flip, you can flip it over and reinstall it or you can store it in a safe place. I flip and reinstall so I know it is in a safe place where I can find it and not in a safe place where I can't find it.
- If you have apps that refresh at some time interval such as BeWeather, Twitter, etc., increase the refresh times to as long a time as you can tollerate.
- Whenever possible, use Wi-Fi to access the internet. Wi-Fi is much cheaper in battery power consumption that the phones internal radio. Be sure the set it so that if Wi-Fi is available it automatically connects to it.
- Be sure that you close apps instead of simply hitting the back key until they go away. You can tell what is open by holding down the BB key for a couple of seconds until the running apps display opens. Any apps you don't need, close them.
These suggestions have helped in battery conservation efforts for lots of folks around here, there are others such as turning of GPS, Wi-Fi and Bluetooth and only turning them back on when you are going to use them. I contend that if I wanted a dumb phone I would have purchased a dumb phone but I wanted a smartphone so I don't want to dumb it down. Just my feeling, not trying to influence anyone.