AllinOne Battery Tester Test a wide range of batteries, including button cells and 9V batteries. This single tool helps you verify battery condition quickly, reducing guesswork and saving time during maintenance or repairs. Quick 9V Detection Instantly know the status of 9V batteries for easy replacement. This helps you avoid unnecessary changes and keeps devices running when you need them. Precise Voltage Readings Clear digital display provides accurate battery measurements. You can rely on the readings to decide whether a battery should be replaced or kept for use in other devices. Secure Magnetic Ports Hold batteries firmly in place during testing. The magnetic ports stabilize the battery for reliable measurement and safer handling. Use scenarios Home and everyday devices Check button cells in remotes, wall clocks, and toys, and verify 9V batteries in smoke detectors or wireless sensors. Quickly determine which batteries need replacement to keep devices functioning. Electronics projects and workshop Test a variety of small batteries before building or repairing projects. Confirm battery health across different cell types to prevent interruptions during assembly or troubleshooting. Field service and onsite checks Carry the tester to customer sites to assess device readiness. Identify batteries that require replacement on the spot, reducing trips and downtime.