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Recently on Cyclingnews.com Mont Ventoux Photo ©: Sirotti	Tech feature: Shimano Dura-Ace Di2 introduction, August 31, 2008 The compact battery is supposedly good for 500 charge cycles and is "conservatively" rated for around 2000km per charge. If you calculate the lifespan based on 10,000km of riding per year… well, you do the math. Photo ©: James Huang/Cyclingnews.com Previous photo    Next photo Latest Photography   Related Gallery   Related Story

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