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  2. Electronic gear-shifting system - Wikipedia

    en.wikipedia.org/wiki/Electronic_gear-shifting...

    The switches send signals through a wiring harness to a battery pack, placed near the bottom bracket. The rechargeable lithium-ion battery pack supplies power to the derailleur motors, which move the derailleurs via worm gears. Shimano estimates that their 7.4-volt battery pack can last up to 1,000 kilometres (620 mi) per charge. [14]

  3. Battery electric multiple unit - Wikipedia

    en.wikipedia.org/wiki/Battery_electric_multiple_unit

    Vivarail battery electric train. Vivarail have produced the Class 230 train which is converted from redundant London Underground D-Stock trains. A demonstrator unit, the two-car 230002, was fitted for diesel-electric- battery power. Vivarail developed a fast charger giving a 100 mi (160 km) range with a 10 minutes recharging time. [1]

  4. Silver oxide battery - Wikipedia

    en.wikipedia.org/wiki/Silver_oxide_battery

    A silver oxide battery (IEC code: S) is a primary cell using silver oxide as the cathode material and zinc for the anode. These cells maintain a nearly constant nominal voltage during discharge until fully depleted. [ 2 ]

  5. Comparison of hub gears - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_hub_gears

    Shimano Alfine SG-500 2006 2016 (?) [15] 8 307% 1600 g City Shimano Nexus Inter-8: 8 307% 5th gear 1550-2040 g City Shimano Nexus Inter-7: 1995 7 244% 1465-1860 g City Shimano Nexus Inter-5E 2019 5 263% 60 Nm 1st gear 1650 g e-bike Shimano Nexus 4 Speed 4 184% 1st gear City Shimano Nexus Inter-3: 3 187% 2nd gear 1220 g City SRAM Spectro E12 (Elan)

  6. Ultium - Wikipedia

    en.wikipedia.org/wiki/Ultium

    Ultium is characterized by a modular layout, using an Ultium battery to supply power to one or two Ultium Drive unit(s) using a common set of power electronics (charging, battery management system, and inverter). The high-voltage battery is composed of pouch cells that can be stacked horizontally or vertically, depending on the form factor ...

  7. Plug-in hybrid - Wikipedia

    en.wikipedia.org/wiki/Plug-in_hybrid

    In March 2015 Audi said they planned on making a plug-in hybrid version of every model series, and that they expect plug-in hybrids, together with natural gas vehicles and battery-electric drive systems, to have a key contribution in achieving the company's CO 2 targets. The Audi Q7 e-tron will follow the A3 e-tron already in the market. [91]

  8. Front freewheel - Wikipedia

    en.wikipedia.org/wiki/Front_freewheel

    The Shimano Front Freewheel (FFS) was a proprietary bicycle drivetrain design of the 1970s that placed a freewheel between the pedal cranks and the front chainrings – enabling the rider to shift gears while coasting. [2] FFS rear freewheel is different than a standard freewheel because it's "stiff" with more friction than a normal rear freewheel.

  9. What Hi-Fi? - Wikipedia

    en.wikipedia.org/wiki/What_Hi-Fi?

    What Hi-Fi? is a website and magazine published by Future. It is a buying guide for consumer electronics, featuring news, reviews and features on hi-fi , home cinema , television and home audio . The website, whathifi.com , is updated daily, while the magazine is published thirteen times per year.