Mophie, the battery pack and case accessory maker, will launch an iPhone 4 verison of its popular Juice Pack case next week. Something that Pocket-lint has been informed by the company, ahead of an official announcement.

Coming in at around $80 in the US (no UK price as been set), the new accessory packs a 1500mAh battery giving iPhone 4 owners another days charge if they really can't get to a power socket.

The case, which slots around the phone top and bottom, will also come with a four light LED status bar at the base of the phone, that takes its design queues from Apple's own offering on its MacBook Pro range, and be charged via USB.

Mophie has opted for a matt finish rather than the previous glossy offering in previous models.

Read our Mophie juice pack air iPhone battery case review.