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Handheld battery tester and code reader with colour screen and attached cable

TopDiag T300PRO 12v 24v 20-2000 CCA Battery Tester Code Reader

SKU CH-683Y-0QD2K

Combines a 12V/24V battery tester covering 20-2000 CCA with a check-engine code reader for 99% of vehicles

  • Team affiliation1 Piece
  • Key features2 in 1 Battery Tester and Code Reader, Jis, En, Din, Sae, Cc
  • Product weight0.508 kg
  • Product typeVoltmeter
  • 8% accuracy from intelligent chips for reliable battery insights
  • Tests 20-2000 CCA across 12V and 24V systems
  • Reads and clears check engine codes with live data
  • Supports JIS, EN, DIN, SAE and other major standards
  • Works on cars, trucks, motorcycles, boats and RVs

12v 24v Battery Tester and Code Reader

The TopDiag T300PRO combines a 20-2000 CCA battery tester with a check engine code reader in one corded unit. It suits DIY owners and technicians who need both electrical system analysis and OBD-II diagnostics for cars, trucks, hybrids, SUVs, boats, RVs and motorcycles. It is not for buyers who need 6V or lithium battery support.

Capacity and Headroom

The tester covers a 20-2000 CCA range across multiple standards including JIS, EN, DIN, SAE, BCI, GB, CA, MCA and IEC. It handles flooded, AGM, GEL and EFB types with 99.8% accuracy when the correct parameters and temperature prompts are selected. It runs out on 6V systems and lithium chemistries, which are explicitly excluded.

Build and Connectors

Weighing .508 kilograms, the corded electric device plugs directly into the vehicle for power and data. The interface supports cranking, charging, load and waveform tests plus a dedicated motorcycle mode. Compatibility claims cover 99% of cars, meaning most 12v and 24v platforms connect without extra adapters.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $60.99
Pricier than about 82% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameTopDiag
Product typeVoltmeter
Size & build
Product weight0.508 kg
More details
Team affiliation1 Piece

Questions about this item

Will the T300PRO 12v 24v tester still read my older car's battery if it only has a 20 CCA rating?

Yes, the tester covers a 20-2000 CCA range, so a 20 CCA battery falls within its measurement window and can be tested on the 12v setting.

How do I confirm the T300PRO is giving accurate 99.8% results after I connect it?

Select the correct battery type, standard, CCA or AH value, in-vehicle or out-of-vehicle condition, and temperature above or below 0°F; the device then runs its intelligent-chip diagnostics and displays the health reading.

Does the T300PRO package include the OBD-II cable needed for the check engine code reader function?

The supplier description lists the tester itself and its 2-in-1 battery and code-reader capability but does not itemise cables or accessories, so verify the contents with the seller before ordering.

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