The replacement battery is working without problems, the Battery Broom has again now Power. Thanks to the built-in manual by Jürgen D. (see ärcher battery broom / Product-reviews / B003U3V3K0 / ref = dpx_acr_txt? Show Viewpoints = 1) the exchange was done in about 30 minutes. Skilled artisans will be surely create even faster, I needed a little longer to the drive belt when assembling to get back on it. I can only recommend the battery.