Pager Battery size "N", "Lady".LR1, MN9100, E90, 910A, AM5.

Panasonic Popular large Torch battery Heavy-Duty Carbon Zinc.May be substituted with Varta if stock runs...

Varta 439

Terminals at opposite ends Eveready #411 NEDA 20837x26x16mm

Special 3 cell Alkaline 4.5V 6300mAh Varta.