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A new battery, small and thin, weighs almost nothing and can be printed in a process similar to silk-screening shirts.
The printable battery is expected to cheap and easy to mass produce and could be used in disposable receipts or cards, engineers in Germany announced today.
The battery weighs less than 1 gram and is less than 1 millimeter thick. It runs at 1.5 volts. Placing several in a row can produce up to 6 volts