Samsung Galaxy S4 battery life tests are done, here's how it did
Samsung Galaxy S4 Review
Samsung Galaxy S4 Review | Trusted Reviews
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New Naztech Power Case For Samsung Galaxy s4 White NP3000S4 Extend Battery Life 633755125485 | eBay
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Amazon.com: FFOGG Galaxy S4 Battery, 2600mAh High Capacity Li-ion Replacement Battery for Samsung Galaxy Galaxy S4, AT&T I337, Verizon I545, Sprint L720, T- Mobile M919, R970, I9500, I9505, Galaxy S4 LTE I9506 :
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Battery Life & Charging - Samsung Galaxy S 4 Review - Part 1
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High Capacity 5980mAh Replaceable Li_ion Battery for Samsung Galaxy S4 SGH-I337 | eBay
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