Battery Life???

I don't believe Apple recommends doing so. Draining the battery completely followed by a complete charge will calibrate the battery indicator.

Copied from this link.

http://www.apple.com/batteries/iphone.html

For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down).

Many answers from many sources. Honestly it is up to you, but no you don't have to.

If you want to keep your phone active for a longer time without recharging, iPhone top third parties sell power packs in the electronics store.

Incase Power Slider I use gives me a 12 hour charge on the daily use.

But I get 12 hours on the built in battery, and I'm pretty much addicted to the phone, especially for email, web access, not that many calls. I charge once per day.

So you are either more addicted than I am, or your battery may be going out, or, more likely, your charge circuitry never gets a chance to calibrate it self by running into the red.

In the normal course of use, I end up running the battery into the red once or twice a month, thereby satisfying Apples recommendation to drain the battery at least once a month to calibrate the battery charge circuitry.

I wonder if the Slider doesn't protect the iphone battery TOO MUCH?