Detect the energy level of batteries ranging from 1.5-4.8V and 9-12V. Easy to operate, with a digital display of the power level. It can test button batteries, lithium batteries, dry batteries, etc. (1)Ultra-wide voltage detection:There are two power levels: 1.5 to 4.8V and 9 to 12V. Battery Bar/Value Dual Display Cover AAA/AA/C/D/CR2016 AG0/14500/16340/10440/18650/9 V / 12 V/button battery, etc. all specifications. (2)One-click quick test:Plug it in and read the results immediately. Get the results in 3 seconds. Zero learning cost. (3)Battery-free design:The measured battery is the power supply, no need to change the battery outdoors, really handy (4)LCD Intuitive display,Instant detection (5)Reverse polarity protection:Even if it is mistakenly inserted in reverse polarity, it will not burn out the machine. Beginners can use it with confidence (6)Anti-drop ABS, no damage if dropped from 1 meter on the construction site (7)Quick battery inspection tools for household remote controls, car keys, electric toys, solar lamps, walkie-talkies, emergency lights, etc Color: Black Material: ABS Package Contents: 1 x Battery Tester