LCR-12V 2,2P: Lead battery, 12 volt, 2.2 Ah, 66 x 177 x 34 mm at reichelt elektronik
Powersonic 12v 0.8Ah Sealed Lead Acid Battery with F1 Terminals PS-0035 Lead Acid (NP/LCR/PS)
LHLL 128 x 64 pocket sized transistor tester Capacity ESR LCR diode triode Triac MOS Meter with LCD backlight|esr meter lcr|triac testertriac transistor - AliExpress