In a support document, Apple tells us that when you eventually send your iPad in to have its battery replaced, Apple will just send you a new iPad instead. The Battery Replacement Service will cost 0.

Ever since Apple ditched the floppy-drive with the original iMac, people have kicked up a fuss about each new hardware “omission”, calling it a “deal-breaker” (as in “No built-in dial-up modem? Sorry Apple. That’s a deal-breaker.”) The latest has been the steady euthanization of user-removable batteries, which started in the iPhone and ended in the MacBook Pro (although nobody moaned about the iPod). Those complainers have now shut up, realizing that the slew of third-party external batteries are both more powerful and less messy to use than actually swapping batteries, but Apple, it seems, is still a little gun-shy.

You won’t be able to use the Battery Replacement Service to replace a broken machine. The support page includes “accident, liquid contact, disassembly, unauthorized service or unauthorized modifications” among the things that will prevent eligibility. And if you are sending the machine in to Apple, the turnaround is a week (make sure you backup first).

The replacements will, we assume, be refurbished models, and its likely that Apple will just hand you one if you take your juice-impaired iPad to a Genius bar. I’d prefer to keep my actual machine, though. I recently swapped an iPod Touch with a dodgy home button for a new unit in the San Francisco Apple Store. The transaction was fast and easy, but the new unit has an even worse problem: a dodgy accelerometer.

Apple Laptop Battery using instruction
Most of the new Laptop Battery at the factory are set to sleep mode, the first boot with only about 5% of the electricity. You should not use an external power supply at this time, let the battery exhausted, until shutdown, then switch on the external ac adapter and the first charge had better over 15 hours. After fully charged, you should charge after the exhaustion of batter, the time of the second and third charge should be more than 12 hours, in order to activate APPLE Laptop Battery and lay a good foundation for future use.
Apple battery life is measured in terms of the number of charging and discharging. Do not enable the APPLE Laptop Battery unless it is necessary, if you don’t use the battery for a long time, you should charge it to about half full and place in a cool place to keep. If you enable the APPLE battery, you should run out of power after the charging, and do not plug in the AC power before exhausted. When the Apple Laptop Battery fully charged, you should disconnect the AC input because overcharge will make the Apple battery overheat and that will shorten the Apple battery life.
Generally speaking, nowadays the laptop are with intelligent Apple battery protection, the APPLE Laptop Battery will not be damaged due to normal operation, but still may damaged for the life-span of travelmate battery or other special reasons.
Lithium-ion APPLE Laptop Battery should fast charge in constant current and then switch to slow charge in constant voltage when the voltage reaches a certain value. Usually the laptop doesn’t have a strictly constant-current charge monitoring device. Charge current will turn small when system load large and vice versa, the current is decided by the Apple AC adapter power margin, it is obviously.
Discharge in a current as small as possible, the action is to slow down the CPU, stop the hard disk, adjust the screen to the most dark, and then do not run any programs until the laptop automatically shut down. The reason to emphasize the small current discharging is to prevent the APPLE laptop premature detect the Laptop Battery voltage shortage.