Amazon.com: Synergy Digital Shaver Battery, Compatible with Braun UR18500Y Shaver, (Li-ion, 3.6V, 1900mAh) Ultra High Capacity, Replacement for Braun 3018765 Battery : Beauty & Personal Care
Original UR18500Y for Braun Shaver Battery Series 720S-4 790CC-4 760 5030S 5040S 3.7V Li-Ion Rechargeable Battery SANYO - AliExpress