Griffin Technology showed off its new Reserve battery case at CES 2017, which has a 3,000 mAh battery and a 3.5mm headphone jack, in addition to still offering a pass-through Lightning connector to charge an iPhone 7. The Reserve joins the OX, from Griffin’s parent company Incipio, as the second iPhone 7 case from a major accessory company to offer an integrated 3.5mm headphone jack. The $99.99 Griffin Reserve looks particularly appealing as a battery pack option for iPhone 7 customers when you compare it to Apple’s own $99 battery pack, which has a smaller battery (only 2,365 mAh) and no headphone jack.