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This is a mini USB meter. It can measure voltage, current, power and capacity.
Power-down storage function: when power off, the accumulated mah will be automatically saved.
Stored mah flashing displayed after boot.
When new mah up to 1 mAh, stored mah will be discussed, and the values will be restarted.
Calculating the capacity and efficiency of mobile phone battery power bank:
Ah Data x voltage output voltage ÷ ÷ battery efficiency = ah phone battery power bank (typically 5 V output voltage, battery voltage is generally based on 3.7 v, typically by 85-90% efficiency)
Over-voltage and under-voltage reminder: when a voltage of more than 5.3 V (less than 4.7 V), the arrow blinks
Mode display: 0.91 '' OLED screen
Voltage measurement range: DC3.70-10.0V
Voltage accuracy: ± (0.3% + 1 word)
Current measurement ranges: DC0.00-3.00A
Current accuracy: ± (0.5% + 2 words)
Power measurement range: 0-30.00 w
Capacity measurement range: 0-99999 mAh
Main color: blue
Size: approx. 57 * 20 * 10mm (l * w * h)
1 x USB power voltage current detector
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