Home Amazon Goldbox deals Amazon: Trianium iPhone 6 Battery Case 3500mAh MFI Cert. Amazon Goldbox deals Amazon: Trianium iPhone 6 Battery Case 3500mAh MFI Cert. By ARCOM - 12 February 2017 318 0 SHARE Facebook Twitter Amazon Goldbox Deal: List Price: $129.95 Deal Price: $37.99 You Save: $52.00 (58%) Trianium iPhone 6 Battery Case 3500mAh MFI Cert. Expires Feb 26, 2017