Samsung Galaxy S4 Battery Life: Early Tests Show Promise
Battery life - Samsung Galaxy S4 review | TechRadar
Abysmal battery life on Gear S4. Look at the percentages that have been used and my current percentage, as well as how long it's been since last full charge. This doesn't add
Battery Life & Charging - Samsung Galaxy S 4 Review - Part 1
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Is battery life getting better on Samsung and other Android smartphones? Good enough to let power iPhone users switch? - Quora