A133 4.5V Alkaline Batteries - Long Lasting Power for Toys, Flashlights, Remote Controls & Electronic Devices (4-Pack)

4.5V 600mAh PX21 M133A Alkaline Battery

4.5V 600mAh PX21 M133A Alkaline Battery. This battery will replace discontinued mercury models cross referenced to this model. Equipment formerly using the mercury model will work although some recalibration may have to be taken into account due to the slightly different voltage & discharge characteristics. Used for Photographic, Pager, Instrument, Electronic and Test Equipment.