Monoprice 아이폰 보조배터리 iphone 백업밧데리 2200mAh
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Lithium-ion External Backup Battery Charger for all generations of Apple iPhone including 3G / 3GS and all iPods with universal dock connectors.
*Charge time: 3.5 hours
NOTE for iPod users: The battery pack blocks the headphone jack while in use. you can not use this battery pack and the iPod simultaneously, due to the orientation of the headphone jack. This is not an issue with the iPhone, which has the headphone jack on the top.
* This battery is NOT compatible with the iPad.