Beslands SF-500 Digital Force Gauge Push and Pull Tester Dynamometer Pressure High Precision LCD Measuring Instruments Thrust Meter Simple Portable (2N-500N);

Model: SF-500
Maximum load: 500N / 50Kg / 110Lb
Load division value: 0.1N / 0.01KG / 0.01Lb
The Sensor: Sensor inside
Precision: ± 0.5%
Power: 3.7V lithium battery
Charging time: 4 ~ 6 hours
Continuous usage time of battery: About 15 hours
Battery Life: ≥300 times
Charger: Input (AC 100-240V 50-60HZ), output (DC 5V 1000mA)
Working Temperature: 5 ~ 35 ℃
Transportation Temperature: -10 ~ 60 ℃
Relative Humidity: 15% ~ 80% RH
The battery has over-load protection in case of short circuit and leakage of electricity .It also can tell you when the battery is running low.It adopt the 3.7V lithium battery and auto shut off with no operation in 10 minutes at the same time