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This review is from: AnkerŪ 2400mAh MFI Apple Certified Premium Rechargeable Extended Battery Case for iPhone 5s, 5 [18-Month Warranty] (Wireless Phone Accessory)
Perfect battery case for iPhone 5s. Apple certified means safe to use. Charge my iPhone 5s from 8% to full, and still has some juice left. Impressive. Highly recommends.