The new battery for electric bikes promises to bring change to the entire industry.
BMZ offers manufacturers a single battery for urban, mountain, and cargo bikes. It promises riders longer range without increased weight and easier repairs.
More energy without a heavier battery
The German company BMZ introduces the Power2Ride RB-900 battery to the American market, which, according to the manufacturer, provides 940 Wh at a weight of 3.8 kg. Its main advantage is the amount of energy stored in a relatively light and narrow casing.
For riders, this means the possibility of longer rides or more frequent use of stronger assistance without a corresponding increase in battery weight. This is valuable in hilly areas, when carrying cargo, or when transporting or loading the bike into a car.
BMZ claims a range of at least 17% longer compared to competing high-capacity batteries under four kilograms. However, it has not disclosed the specific models used for comparison or the measurement conditions. The range in kilometers will depend on the bike’s power consumption, route, load, and assistance settings.
One platform for multiple brands and bike types
The broader significance of the RB-900 lies in its ability to be adapted by manufacturers for various categories of e-bikes. The same foundation is intended to serve commuter city bikes, off-road mountain bikes, and cargo bikes. BMZ mentions compatibility with Shimano, Panasonic, Motinova, Bafang, and other drivetrains.
Brands can thus use a common battery platform across their entire lineup, rather than developing separate battery designs for each category. This can simplify the development and introduction of new models. However, the final price of the bike will depend on the specific manufacturer and its full configuration.
For consumers, broader adoption would primarily mean a wider selection of e-bikes with similarly high capacities. They wouldn’t be confined to a single brand or type of drive system. Nevertheless, the specific mounting, electronics, and service solutions are still determined by the bike manufacturer, so battery compatibility across different brands cannot be assumed.
Longer rides for smaller riders too
A large battery must first fit within the frame. With smaller sizes, a long battery case can limit the space available to designers. The RB-900 has a short shape with an oval cross-section, and according to BMZ, it can be installed even in S-size frames.
A higher capacity could also be more accessible to riders of smaller build. Manufacturers can install the battery in the lower frame tube from the top, bottom, or slide it in depending on the specific model’s design.
For cargo bikes, the platform supports two batteries. At the stated capacity, they would provide a total of 1.88 kWh of energy, suitable for longer delivery routes for example. The second battery naturally adds extra weight, which must be taken into account when designing and using such a bike.
Repairability can be just as important as range
BMZ mentions a modular design and the possibility of replacing individual cells. This would allow maintenance to address certain faults without replacing the entire battery. For owners, this could mean a longer battery lifespan and lower repair costs. The manufacturer has not yet specified exact prices or service terms.
According to BMZ, the case offers IP67 protection against dust and water. Its detachable design is also intended to facilitate recycling at the end of its lifespan.
However, differences still exist in the technical specifications. The new report and part of the product page state 940 Wh, while an early technical sheet from June 2025 still lists a maximum of 860 Wh for the same weight. BMZ has not explained how it achieved higher capacity through modifications.
The impact on the entire industry will depend on the expansion of this platform among manufacturers. If it is adopted by more bikes and comes with accessible repairs, customers will realize its benefits when choosing a new e-bike or even years later. For now, it remains a promise backed by the manufacturer’s specifications, with its practical value to be demonstrated by specific models.
Sources:
Original text / Elektrickevozy.cz
BMZ / PR Newswire
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