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The Bosch PowerPack Rack 400 Electric Bike Battery Anthracite is a 36 V / 11.0 Ah lithium-ion rack battery designed for easy mounting on step-through bikes, delivering reliable assistance for Active Line, Performance Line and Performance Line CX drivetrains. Its intelligent battery management system protects cells from overheating, overcharging and deep discharge, the five-LED indicator shows remaining charge, and the chemistry offers no memory effect, low self-discharge and long service life for everyday riding and extended storage.