Wouldn't charging it a lot degrade the battery? How is it bad though?
Over-charging the phone is bad. What I mean is, don't leave it charging for hours after it reaches 100%. But charging your phone frequently is not bad. In fact, I've read in many different publications that it's actually good for your phone because you want to keep the battery's electrons moving. This is good because of the type of battery Apple chose for their iDevices: lithium-ion. I can provide a couple links if you'd like but it's just as easy for you to google this as it is for me. I believe LifeHacker was one place I read this.
Edit: A couple quick quotes...
From Apple's website: Use iPhone Regularly.
For proper maintenance of a lithium-based battery, its 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).
From Wikipedia's page on lithium-ion batteries: Prolonging battery pack life.
1) Avoid deep discharge (depletion) and instead charge more often between uses. The smaller the depth of discharge, the longer the battery will last.
2) Avoid storing the battery in full discharged state. As the battery will self-discharge over time, its voltage will gradually lower, and when it is depleted below the low-voltage threshold (2.4 to 2.9 V/cell, depending on chemistry) it cannot be charged anymore because the protection circuit (a type of electronic fuse) disables it. It is frequently recommended to store batteries at 40% charge level.
3) The rate of degradation of Lithium-ion batteries is strongly temperature-dependent; they degrade much faster if stored or used at higher temperatures and may even be stored in a refrigerator.