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Black rectangular digital battery tester with LED display and clamps

LUOM

LUOM KW650 6V 12V Battery Tester

SKU CH-F4QG-DKCPM MPN KW650

Tests 6V and 12V batteries from 100 to 2000 CCA with 99.5% accuracy and shows health, charge status and replace-or-recharge advice in milliseconds

  • DC voltage12 V
  • Analog/digitalDigital
  • Energy Star statusEnergy Star Qualified
  • Input current rating15A
  • Maximum output current15A
  • Maximum ohms1M Ohms
  • Tests 6V and 12V batteries from 100 to 2000 CCA
  • Delivers over 99.5% accuracy via STM-32 chip
  • Shows health percentage and Good/Recharge/Replace advice
  • Tests battery in or out of the vehicle
  • Includes alternator and starter system diagnosis

6V & 12V Battery Tester

The LUOM KW650 is a digital battery analyser for 6V and 12V lead-acid batteries from 100 to 2000 CCA. It suits professional technicians and DIY owners who need fast health checks on cars, trucks, motorcycles, boats or lawn mowers. The tester works with flooded, AGM flat-plate, AGM spiral and gel types both in and out of the vehicle. Results appear in milliseconds on the built-in display.

Thermals Noise Power

The unit draws power from the battery under test and requires a single AAA battery for its own supply. Maximum input and output current is rated at 15 A. Operating noise stays within a range of -10 to 56 dB during normal use. An STM-32 chip delivers more than 99.5 % accuracy for voltage, internal resistance, cold-cranking amps, health percentage and charge status.

Build Fit Needs

The compact housing measures 5.94 x 3.22 x 2.2 inches, so it fits easily in a glovebox or tool bag. Clips connect directly to battery terminals with automatic polarity indication. No external power source or computer link is required for basic testing. The package includes the tester, a user manual and access to a firmware update function for future protocol support.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $48.99
Typical for this category: the median of 3,030 items is $54.99.

Specifications

Product
Brand nameKonnwei
Model nameKW650
Color and finishBlack
Product typeMultifunction Testers
Performance
Measurement accuracy±6 mm
Power
DC voltage12 V
Input current rating15A
Maximum output current15A
Battery typeAAA battery
Size & build
Size or dimensions5.94 × 3.22 × 2.2 in
In the box
Number of items1× KONNWEI KW650 Car Tester
1× User Manual
1× We provide 3 years long after-sale service.
Environment & compliance
Energy Star statusEnergy Star Qualified
Operating noise-10 to +56 dB
Certifications and standardsUL/CSA
More details
Analog/digitalDigital
DC polarity indicatorYes
Maximum ohms1M Ohms
Commercial or home useCommercial

Questions about this item

How do I connect the KW650 to test a 12V battery in my car, and what is the common mistake to avoid?

Clamp the red lead to the positive terminal and the black lead to the negative terminal; the common mistake is reversing the polarity, which the unit will indicate but will not protect against damage.

What maintenance will the KW650 require over time, and which user-replaceable part is involved?

The tester runs on AAA batteries; replace them when the display dims or the unit fails to power on, using the battery compartment on the rear of the device.

What is the first limit the KW650 reaches during sustained high-current testing?

The maximum input and output current is rated at 15A; exceeding this during prolonged load testing will trigger the internal protection and stop the test.

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