Voltage tester for 18650 batteries, voltage detector for 9V button cell batteries, AAA battery tester--BIEMMEDUE

Product advantages: No mains connection required; fast battery voltage measurement; digital result display; compact and portable. Product features: Suitable for testing all 9V, AAA, DI, AA, and button cell batteries; direct digital voltage display. Instructions for use: 1. Connect a 9V battery directly to the two test openings on the side of the tester, ensuring correct polarity. 2. For other battery types, open the test arm at the top of the tester using the lever and insert the battery, ensuring correct polarity. Product dimensions: 92 × 63 × 14 mm. Product weight: approx. 36 g. Standard configuration: Tester only (battery not required).