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A comment on Samsung Develops Battery Material with 5x Faster Charging Speed. Parent comment

Re:Samsung Develops Battery Material with 5x Faster Charging... by icebraining on Wednesday November 29, 2017 @03:02AM (#15805368)
If every year you lose 20% of your money, how long does it take until you're in the negative?
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Re:Samsung Develops Battery Material with 5x Faster Charging... by madengr on Wednesday November 29, 2017 @10:24PM (#15813215)
If you have a solar cell that starts with 20% efficiency, how many years of “20% increase claims” does it take to reach 200% ?
[ Parent | on HN ]