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Handheld rectangular battery tester dark grey finish red and black clamps small colour screen

VDIAGTOOL BT300 12V 6V Battery Tester 5-3000 CCA

SKU CH-ZEVW-VGRFB

Tests 6V and 12V lead-acid batteries from 5 to 3000 CCA, measuring voltage, load, internal resistance, ripple, SOC, SOH, charging and cranking performance for cars, motorcycles, trucks, SUVs.

  • FeaturesVDIAGTOOL BT300 car battery tester*1, Plug and Play, Powered
  • Height6.45 L x 3.35 W x 0.96 H inches
  • Width6.45 L x 3.35 W x 0.96 H inches
  • Length6.45 L x 3.35 W x 0.96 H inches
  • Weight0.43 kilograms
  • Sports Team1 Piece
  • Tests 6V and 12V lead-acid batteries from 5 to 3000 CCA
  • Checks voltage, load, internal resistance, ripple, SOC, SOH, cranking and charging systems
  • Powered by the vehicle battery so no separate charging is required
  • Compact 6.45 x 3.35 x 0.96 inch design weighs only 0.43 kg
  • Adjustable CCA settings in ±5 or ±50 steps for precise readings

Compact Diagnostic Tool for 6V

The VDIAGTOOL BT300 is a handheld battery tester designed for 6V and 12V lead-acid batteries including AGM, GEL and VRLA types. It covers a testing range from 5 to 3000 CCA and draws power directly from the battery under test, so no separate charging is required. The unit suits DIY owners and professional technicians who need a quick health check on cars, motorcycles, trucks, SUVs, boats or ATVs. It is not intended for lithium chemistries or golf-cart deep-cycle batteries.

Plug-and-Play Operation With Adjustable CCA Settings

Connect the clamps to the battery terminals and the tester powers up instantly, leaving both hands free for the display. Selectable CCA increments of ±5 or ±50 let you match the test parameter to the battery label for tighter accuracy. The compact housing measures 6.45 by 3.35 by 0.96 inches and weighs 0.43 kilograms, so it fits in a glovebox or tool pouch without crowding other gear. No external cables, adapters or software installation are needed.

Sustained Load Analysis Across Multiple Parameters

Under continuous load the BT300 reports voltage, internal resistance, ripple, state of charge, state of health, CCA value, plus cranking and charging system performance in a single session. The algorithm maintains the load long enough to stabilise readings rather than capturing a momentary spike, giving a clearer picture of real-world starting capability. Regular use tracks degradation trends so ageing cells can be replaced before they fail in cold conditions.

Highlights

  • Tests 6V and 12V lead-acid batteries from 5 to 3000 CCA
  • Checks voltage, load, internal resistance, ripple, SOC, SOH, cranking and charging systems
  • Powered by the vehicle battery so no separate charging is required
  • Compact 6.45 x 3.35 x 0.96 inch design weighs only 0.43 kg
  • Adjustable CCA settings in ±5 or ±50 steps for precise readings

Specifications

BrandVDIAGTOOL
FeaturesVDIAGTOOL BT300 car battery tester*1, Plug and Play, Powered By Car Batteries, No Need for Charging, false
Height6.45 L x 3.35 W x 0.96 H inches
Width6.45 L x 3.35 W x 0.96 H inches
Length6.45 L x 3.35 W x 0.96 H inches
Weight0.43 kilograms
Sports Team1 Piece
TypeMultimeters, Tach & Dwell Meters

Questions about this item

How many cold-cranking amps can the BT300 measure before the reading tops out?

The tester covers a 5 to 3000 CCA range with adjustable ±5 or ±50 CCA steps for lead-acid, AGM and GEL batteries.

Does the BT300 need its own power source or cooling during extended testing sessions?

It draws power directly from the battery under test, requires no charging and has no fan, so it adds no heat or noise of its own.

Which battery posts or connectors must the vehicle already have for the BT300 to attach?

Standard top-post or side-post 6 V and 12 V lead-acid terminals; the unit clamps directly onto them.

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