red digital measuring multimeter on wooden floor. it shows 4.33v or fully charged battery. includes voltmeter, ampermeter, ohmmete

accuracy ampermeter background battery black board calibration charged circuit computer connection device devices diagnostic digital display electric electrical electrician electricity electronic electronics engineer engineering equipment floor fully illustration includes industrial industry instrument it lab laboratory measure measurement measuring meter multimeter ohm ohmmete ohmmeter or power professional red repair service shows technical technician technology test tester tool voltage voltmeter white wooden work working