Power and battery
The iPad uses an internal rechargeable lithium-ion polymer battery (LiPo). The batteries are made in Taiwan by Simplo Technology, which makes 60% of them, and Dynapack International Technology.[35] The iPad is designed to be charged with a high current (2 amperes) using the included USB 10-watt (0.013 hp) power adapter. While it can be charged by a standard USB port from a computer, these are limited to 500 milliamperes (half an amp). As a result, if the iPad is turned on while being charged with a normal USB computer port, it will charge much more slowly, if at all.[citation needed]
Apple claims that the iPad's battery can provide up to 10 hours of video, 140 hours of audio playback, or one month on standby. Like any battery technology, the iPad's LiPo battery loses capacity over time, but is not designed to be user-replaceable. In a program similar to the battery-replacement program for the iPod and the original iPhone, Apple will replace an iPad that does not hold an electrical charge with a refurbished iPad for a fee of $99 (plus $6.95 shipping).[36][37]
Storage and SIM
The iPad was released with three options for internal storage size: a 16, 32, or 64 GB flash drive. All data is stored on the flash drive and there is no option to expand storage. Apple sells a camera connection kit with an SD card reader, but it can only be used to transfer photos and videos.[38]
The side of the Wi-Fi + 3G model has a micro-SIM slot (not mini-SIM). Unlike the iPhone, which is usually sold locked to specific carriers, the 3G iPad is sold unlocked and can be used with any compatible GSM carrier.[39] Japan is the exception to this, where the iPad 3G is locked to Softbank.[40] In the U.S., data network access via T-Mobile's network is limited to slower EDGE cellular speeds because T-Mobile's 3G Network uses different frequencies.[41][42]
Optional accessories
Apple offers several iPad accessories, including:[9]
* iPad Keyboard Dock with hardware keyboard, 30-pin connector, and audio jack
* iPad Dock with 30-pin connector and audio jack
* iPad Dock Connector to VGA Adapter for external monitor or projector
* iPad Camera Connection Kit including a USB Type A connector adapter and an SD card reader, for transferring photos and videos
* iPad 10W USB Power Adapter with 2 A output (10 W)
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