The MicroEnergy battery series

Modular battery system for Nano- & Micro-Satellites with best-in-class performance,

based on the MicroEnergy BM-72 battery module.

MicroEnergy BM-72 Battery Module

First MicroSat battery with tested ageing quantification

Accelerated-ageing battery test approach enables 2x faster ageing testing. Only 2.5 % capacity fade after 1.2 years (7,000 full orbit cycles) of tests in simulated orbit environment.

Exceptionally light & small

Over 205 Wh/kg gravimetric energy density and 216 Wh in 0.75 U (CubeSat format) volumetric efficiency.

35 % lighter than the average competitor systems.

State-of-the-art battery chemistry

First MicroSat battery employing 21700 cell format battery cells with the latest cell chemistry inside.

Developed with pilot customer & ESA

Optimized for next-generation satellite constellations.

Key Specifications

Cell type


Voltage nominal (max/min)


Energy Density

Charge power max

Discharge power max

Continuous power density

Peak power density

Nominal capacity



Capacity fade after 7,000 cycles (approx. 1.2 years of full LEO orbit power cycles, tests ongoing)

Lithium-ion 21700 cylindrical cells


14.4 V (16 V / 10 V)

72 Wh

205 Wh/kg

60 W

160 W

400 W/kg

900 W/kg

5 Ah

96.72 x 90.17 x 25 mm³

351 g



Get the full BM-27 datasheet

Excellion GmbH

Claude-Dornier-Str. 1, Building 401

82234 Wessling


By requesting the datasheet you agree to our terms and conditions and privacy policy.