Anker SOLIX BP1000 Expansion Battery features our proprietary long-lasting technology InfiniPower. The expansion battery powers up for over 3,000 battery cycles—or every day for 10 years. Give your Anker SOLIX C1000 power stations an extra 1056 Wh of power with this expansion battery. With up to 3,000 charge cycles, it'll stay strong for a decade even after everyday usage. The 3-point locking system keeps all your electronics safe. You get a steady and reliable connection with its InfiniPower technology – no flickers, no fuss. It's drop-proof and sits perfectly on the top of the power station. Please note: The expansion battery cannot be used separately. It must be connected to the power station to charge or discharge, and to monitor its status via the Anker app.