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Li-ion batteries last 5x longer

Researcher Andreas Gutsch from the Karlsruhe Institute of Technology said at the PV Symposium in Germany recentlythat some lithium-ion cells working in storage systems experienced up to 30% capacity loss after 1,000 cycles, while some cells have a better capacity after 5,000 cycles. In other words, there can be quite a lot of variation in lithium-ion cell performance.

Testing conditions did not allow him to reveal the names of cell manufacturers. The cells were not easy to obtain for testing and he could not disclose that specific information. However, his test results did reveal that cells from China that were tested had the performance that decreased most rapidly. Cells from Japan and Germany did the best, while ones from South Korea and the US were in the middle of the performance range.

More http://cleantechnica.com/2015/03/27/battery-storage-test-shows-lithium-ion-cells-last-5x-longer/

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