We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two small rectangular USB testers with LCD screens, dark plastic finish, each about 59 mm long

2Pcs LCD USB Ampere Meter Power Capacity Meter Mobile Power electrical system tool

SKU CH-ZXKZ-X4MPH

Two-piece USB tester measures voltage, current, power and capacity with ±1% accuracy for power banks and phone batteries

  • FeaturesBattery Powered, false
  • Sports Team2 Piece
  • TypeMultimeters, Tach & Dwell Meters
  • Precise ±1 % readings for voltage, current, power and capacity
  • Compact 59 mm body fits in a pocket
  • Automatic real-time display removes manual calculation
  • Measures 4–20 V input and 0–3 A current range
  • Lightweight 20 g design is easy to carry

Portable USB Power Meter Pair

This two-piece set of LCD USB testers lets technicians and hobbyists measure voltage, current, power and capacity on mobile power sources and phone batteries. Each unit provides ±1% accuracy for reliable charge monitoring in the field or on the bench.

Compact Meter Thermals Noise Power

The meter body measures 59 by 23 by 13.5 millimetres, extending to 73 millimetres with the USB connector, and weighs 20 grams. It operates passively across a 4 to 20 volt input range and a 0 to 3 amp current range without active cooling or audible noise.

Real-Time Display Auto Calculation

The built-in LCD automatically shows live charging data and calculates power and capacity values, removing the need for manual computation. This instant feedback helps users optimise device performance during testing sessions.

Highlights

  • Precise ±1 % readings for voltage, current, power and capacity
  • Compact 59 mm body fits in a pocket
  • Automatic real-time display removes manual calculation
  • Measures 4–20 V input and 0–3 A current range
  • Lightweight 20 g design is easy to carry

Specifications

BrandEC Buying
FeaturesBattery Powered, false
Sports Team2 Piece
TypeMultimeters, Tach & Dwell Meters

Questions about this item

How do I plug the KWS-V20 tester in without damaging the USB port?

Insert the tester between the charger and the cable so the male USB-A goes into the power source and the female USB-A accepts the device cable; the 59 mm body (73 mm with plug) clears most adjacent ports.

What part of the KWS-V20 will wear out first with daily use?

The USB-A male and female connectors are the only mechanical parts; repeated insertion cycles will degrade contact spring tension before the LCD or internal shunt shows drift.

At what current does the KWS-V20 stop measuring accurately during a long charge?

Accuracy of ±1 % is specified up to 3 A; sustained loads above that limit exceed the shunt rating and the tester will no longer guarantee the stated precision.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.