Lithium-Ion (Li-Ion). 5570 mAh 86 Wh. 15.44 V. Brand compatibility: Lenovo. Black. Number of batteries included: 1 pc(s). BTI replacement 4 cell battery for LENOVO THINKPAD P16S GEN 1, P16S GEN 1 21BT, P16S GEN 1 21BU, P16S GEN 1 21CK, P16S GEN 1 21CL, P16S GEN 2. Features. Brand compatibility. Lenovo. Product colour. Black. Battery voltage. 15.44 V. Number of battery cells. 4. Battery capacity. 5570 mAh. Battery technology. Lithium-Ion (Li-Ion). Certificates. Certification. UKCA, CE. Compliance certificates. CE, UKCA. Sustainability. Sustainability compliance. Yes. Packaging data. Quantity per pack. 1 pc(s). Number of batteries included. 1 pc(s). leaflet. Origin Eco. Origin Promo