Wide Application and Compatibility Tests all common battery types: AA, AAA, C, D, 9V, and mini cell Size: 111 x 60.5 x 26 mm Test range: 1 , 2V 4.8V Precise and Easy to Read The power level is clearly indicated on the display for quick assessment of remaining capacity No Power Supply Required No external battery needed to operate Compact and portable design for convenient use anytime, anywhere Why customers need it Simplifies battery health checks by providing an immediate readout Reduces guesswork and unnecessary replacements Small, lightweight tester that fits in a tool bag or drawer Use scenarios Home and family devices: quickly check batteries in remotes, wireless mice, keyboards, and toys Workshop or maintenance tasks: assess NiMH/NiCd rechargeable cells before use in flashlights or tools Office or travel: verify 9V batteries in smoke detectors, clocks, and portable devices