Battery Guru BG840 battery - 17,5 Ah

Price: €462.72 462.72
Net price: €376.19

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The Battery Guru Li-ion battery is specially designed for the Rapid S-1100 and Rapid S-2100 kits (the Rapid S-3000 kit recommends a 12.5 Ah battery built on high-current cells or a battery with a larger capacity of at least 20Ah).

The battery consists of 65 cells assembled in the 13S5P configuration. It is equipped with a backlit display informing about the battery charge status.

The battery has a built-in BMS (Battery Management System) that protects it from overcharging and over-discharging.

Along with the battery you will get a 2A BG Silent Charger (when ordering you can choose a faster charger or select the option "Without charger" - the price will be automatically updated).




2-year warranty and insurance

Each battery is covered by a 2-year warranty, which can be implemented throughout the European Union. In addition, the batteries have an OC insurance against the consequences of unfortunate accidents.


Tested before shipment

Before the battery reaches the customer, we test its capacity, maximum load and discharging profile. On request, we also provide a detailed report from the tests and a thermovision photo.


Charge indicator and voltmeter

Each of the batteries in the heat-shrinkable sleeve is equipped with a display, indicating both the percentage of battery charge and their voltage.


Battery produced in Europe

All batteries available in the store are made only from branded cells (Samsung, LG, Panasonic), and all production takes place in the European Union - it guarantees high quality and efficiency.



Before buying, check whether the battery will fit the frame of your bike - download and print our templates:


Technical data

Nominal capacity 17,5 Ah
Nominal voltage 48V
Maximum voltage 54,6V
Configuration 13s5p
Cell type Samsung 35E
Recommended load 35A
Amount of stored energy ~840 Wh
Number of cells 65 pcs.
Dimensions 11 x 26 x 7 cm
Weight 3,7 kg
Maximum charging current 5A

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