Travel and Outdoor Equipment Price Comparison > Miscellaneous
This week's most popular products:
These Duracell CR2025 Lithium Batteries are ideal for Front and rear LED lights, car key fobs and security systems, watches, clocks, PDAs, glucometers, cameras, digital thermometers, calculators and computer equipment, and much more.
Spare Cateye 1620 Battery Tomo, for use with compatible cycle computers and heart rate monitors.
As an addition to the mechanical Dura-Ace 7900 series, the electronic Dura-Ace 7970 will deliver state-of-the-art technology that will give its users a revolutionary road riding experience. Di2 stands for 'Digital Integrated Intelligence'. This innovative shift technology is still based on the Shimano Index System (SIS) that has proved its superior gear changing characteristics over the years. The big difference is that in this case , the shifting action is provided for by electronics instead of mechanics. This electronic shifting system was tested extensively over the past two years by several professional riders in all conditions possible, such as rain, mud, low temperatures, cobble stone roads and combinations of all of these at the same time. Dura-Ace 7970 series consists of Dual Control Levers, front and rear derailleur's and a battery kit combined with remaining 7900 mechanical components. Use the Shimano 7970 Dura-Ace Di2 Battery Mount Adapter if standard mount is not compatible with your bike. If you are having problems making the Di2 battery fit try the battery mount adapter.
The power house of Di2 is the long-life 7.4V Li-Ion Shimano 7970 Dura-Ace / 6770 Ultegra Di2 Battery that is both compact and reliable, taking shifting effort away from you. Excellent sealing and reliability have been proven through repeated field tests in various riding conditions, including extreme temperatures, rain, mud, and cobble stone roads. Using a hard wired battery system which is both light weight and accurate compared to current wireless technology (as a wireless system would require 4 batteries: one for the RD, one for the FD, and one for each shift lever). The use of a single small and discreet battery is light weight, efficient and creates a robust and reliable system.