Amazon.com: Exell Battery 411A Compatible with Avometer MK III Model 8 : Health & Household
Avometer - Wikipedia
AVO 8 Battery Replacement BLR121 / B121
BTMETER BT-39C True RMS Multimeter, Auto Range Digital Avometer 6000 Counts Accurate Measures AC/DC Amps, Volts, Ohms, Capacitance,Frequency with Auto Backlight, NCV Temp Test: Amazon.com: Tools & Home Improvement