2Pcs/lot 22.5V 15F20 Primary Battery High Capacity Heavy Duty Battery| battery diamond|battery emergencybattery reserve - AliExpress
✩ 2Pcs 15F20 22.5V Dry Battery 412U15VS084 MN122 for Tube Radio Analog Voltmeter - Rome Tech
Exell 505 22.5v Alkaline Battery - Battery Store
If you have a Simpson 160 VOM and your 22.5V battery dies, instead of paying $12-25 for a new one, stack 13 AG10s and two AG12 1.5V button batteries in shrink wrap.