Logitec Japan has released a new battery pack for Apple’s iPhone 4 named the LDT-1Si41. This battery pack is interesting also beacause it comes equipped with a built-in 1,500mAh battery and a 1Seg TV tuner, which allow users to watch TV shows in Japan when on-the-go. The Logitec LDT-1Si41 retails for 12,800 Yen or $164.

Tags: Accessories, Apple, battery pack, iPhone cases, logitec