What's the purpose of warranty if you have to pay for a defective battery? As you can see below, they will replace dead batteries under warranty on iPod, iPod Touch, iPhones, Notebooks and now the iPads. Same policy they've ran for years, but NBMs as we are finding out in these posts never new this.
http://www.apple.com/batteries/replacements.html-----------------------------------------------
Apple's Battery Replacements Policy:
After a period of time that will vary depending on use and settings, you may find that your battery will power your device for only a couple of hours, requiring you to charge more frequently. Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced.
You may choose to replace your battery while it still has a little juice left, or wait until the battery does not hold enough energy to power your device at all to replace it. As with all batteries, proper disposal is essential. Check with your local waste or recycling company to determine the disposal method for your area. Putting any battery directly in the trash harms the environment.
iPod Owners
Your one-year warranty includes replacement coverage for a defective battery. You can extend your coverage to two years from the date of your iPod purchase with the AppleCare Protection Plan for iPod. During the plan?s coverage period, Apple will replace the battery if it drops below 50% of its original capacity. If it is out of warranty, Apple offers a battery replacement for $49 (iPod shuffle), $59 (iPod nano and classic), $79 (iPod touch) plus $6.95 shipping, subject to local tax. Apple disposes of your battery in an environmentally friendly manner.
iPhone Owners
Your one-year warranty includes replacement coverage for a defective battery. You can extend your coverage to two years from the date of your iPhone purchase with the AppleCare Protection Plan for iPhone. During the plan?s coverage period, Apple will replace the battery if it drops below 50% of its original capacity. If it is out of warranty, Apple offers a battery replacement for $79, plus $6.95 shipping, subject to local tax. Apple disposes of your battery in an environmentally friendly manner.
Notebook Owners
Your one-year warranty includes replacement coverage for a defective battery. You can extend your replacement coverage for a defective battery to three years from the date of your notebook purchase with the AppleCare Protection Plan. However, the AppleCare Protection Plan for notebook computers does not cover batteries that have failed or are exhibiting diminished capacity except when the failure or diminished capacity is the result of a manufacturing defect. Apple offers a battery replacement service for MacBook Air and all MacBook Pro notebooks with built-in batteries. You can purchase replacement batteries for late models of Apple notebooks directly from the Apple Store.
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iPad Owners:
Every iPad comes with complimentary telephone technical support within 90 days of your iPad purchase. In addition, your iPad, its rechargeable battery, and all included accessories are covered against defects for one year from the original purchase date by a limited hardware warranty.......
http://store.apple.com/us/browse/home/shop_ipad/family/ipad