Varta V28PX (4SR44) Primary Silver Oxide Battery – 6.2V, 145 mAh, size 13 mm × 25.2 mm, 11.1g. Ideal for cameras, car central locking, and remote controls, replacing discontinued PX28 mercury cells. Offers long shelf life and precise energy for electronic devices, available as a single unit, 145 mAh-Single Pack, Retail Box