Amazon.com: Synergy Digital Shaver Battery, Works with Philips Norelco AT811 Shaver, (Li-Ion, 3.7V, 750 mAh) Ultra High Capacity, Compatible with Arcitec 036-11290 Battery : Electronics
OrangeYu 2000mAh Shaver Battery for Philips HQ6675,HQ6676,HQ6695,HQG265,HQC280,HQC281,HQT360,HQT368,HQT388,HS199,PQ222,RQ320 - AliExpress