Contact Us

Please use the form on the right to contact us, or call 202 794 6620. We are happy to answer any question about electric bikes that we can. 

Allow up to 24 hours for a response - we get very busy helping folks in the store! 

Hope to see you soon! 

ElectriCityBikes Team


4810 Wisconsin Avenue Northwest
Washington, DC 20016
United States


We have carefully curated the most reliable and innovative models of electric bikes from the top brands - Specialized, Kalkhoff, Focus, Raleigh. Come in today to browse and a free test ride - try before you buy! Our head tech has over 5 years experience in all brands and types of e-bikes and kits. Electricity Bikes was founded by City Bikes, pioneers of the urban transportation bike shop in DC since 1988.  

Dual Battery Option

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Dual Battery Option

Charlie McCormick

Riese & Müller is one of the first E-Bike manufacturers to implement Bosch Dual Battery technology. which makes their bikes unbeatable when it comes to range. Note that 2 batteries will add considerably more weight to the bike, usually around 7lbs, and can't be retrofitted, so you gotta choose it up front. You can try before you buy with Bosch’s range calculator - select dual or single to compare.

How does the Dual Battery technology work?

While riding, the batteries alternate. The system automatically tracks the charge states of both batteries and switches between them when it detects a charge difference of five percent. This ensures that both batteries are discharged and used in an equal manner, which significantly prolongs the service life of the batteries. If necessary, riders also have the option to use just one battery. In this case, it doesn't matter which unit the battery is attached to. The two batteries can be charged directly on the bike or detached and charged on an external charger – which is very convenient when no socket is nearby. Both batteries have the same key, which saves time searching for the right one. The same charger can be used to top up the batteries whether mounted or removed, but it is only possible to charge both of them simultaneously directly on the bike. The charging time for both 500 Wh batteries, starting from a completely discharged state, is about 9 hours, or 4.5 hours for just one of them.