VDIAGTOOL BT500 Car Battery Tester

The VDIAGTOOL BT500 is a battery tester listing battery, cranking and charging test functions. It is presented for 6V, 12V and 24V batteries, but not lithium batteries, with the listing also giving a 5-3000 CCA range.

At a glance

Lists battery condition, cranking and charging tests, plus voltage, internal resistance, CCA, state of health and state of charge results.
Listing claims compatibility with several lead-acid battery types and standards across a broad stated CCA range.
Test results can be stored and reviewed on the device screen, according to the listing.

Price

£55.23Save 15%

Reference price: ~~£64.99~~

Price checked: 14 Nov 2026

View offer

Pros and cons

Pros

Battery, starter cranking and alternator charging tests are combined in one device.
The stated battery-type and vehicle compatibility covers more than standard car batteries, including motorcycles, boats and golf carts.

Cons

Lithium battery testing is explicitly unsupported.

Technical specifications

12 specifications

Identity
Brand	VDIAGTOOL
Model	BT500

Power and battery
Power configuration	Battery Test, Cranking Test, Charging Test

Dimensions and installation
Dimensions listed	16.4 x 8.5 x 2.4 centimetres

Listed battery compatibility
Battery voltage and CCA range	6V 12V 24V batteries with ratings 5-3000 CCA
Battery chemistries listed	regular flooded, AGM flat plate, AGM spiral, GEL, EFB battery
Battery standards listed	CCA, BCI, CA, MCA, JIS, DIN, SAE
Compatible vehicles listed	Cars, Trucks, SUVs, Motorcycles, RVs, ATVs, Boats, Golf Carts
Minimum operating voltage	6 Volts
Colour	Black

Reported measurements and functions
Battery results listed	voltage, internal resistance, cold cranking amp and battery health(SOH) and charge status(SOC)
Additional tests listed	Capacity, Load, Resistance, Ripple, SoC, SoH, Cranking and Charging Test

What to know before buying

Listing details to confirm

Listing details are inconsistent about supported voltages: the title and main compatibility claims say 6V, 12V and 24V, other copy adds 9V, the minimum operating voltage is listed as 6 Volts, and customer feedback includes a report of testing only 12V and 24V. Check that the exact battery voltage and menu procedure you need are supported. The listing says to switch off electrical devices during charging tests. It also gives conflicting protection counts, describing five protections in one section and four in another.

What’s in the box

Included

VDIAGTOOL BT500 car battery tester (1)

Who is it for?

A good fit for

DIY vehicle owners wanting battery, cranking and charging checks across supported lead-acid battery types.
People maintaining listed vehicle types beyond cars, such as motorcycles, RVs, boats or golf carts.

Less suited to

Owners who need a tester for lithium batteries.
Buyers who require confirmed support for a particular battery voltage without resolving the listing's inconsistent claims.

VDIAGTOOL BT500 Car Battery Tester · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 398 ratings

5 stars74%74%
4 stars12%12%
3 stars7%7%
2 stars2%2%
1 star5%5%

Customer feedback describes the tester as handy, with a readable display and some reports of graphing results. Functionality, accuracy and battery testing receive mixed feedback, including a report that one unit only tested 12V and 24V. This matters if you need dependable results across the wider voltage range claimed in the listing, so confirm your intended battery compatibility. The supplied ratings distribution is mostly five-star but also includes lower ratings, and does not establish why customers rated it as they did.

Positive themes

Customers describe it as handy, and feedback mentions a display that is easy to read at most angles.
Some customer feedback describes it as inexpensive.

Mixed feedback

Customers report mixed experiences with functionality, accuracy and battery testing.

Frequently asked questions

Does the BT500 test lithium batteries?

No. The listing explicitly says it does not support lithium batteries.

Which battery voltages does it support?

Most listing copy claims 6V, 12V and 24V, while another passage also mentions 9V and customer feedback reports testing only 12V and 24V. Confirm compatibility for your specific battery before buying.

What tests does it offer?

The listing describes battery health testing, cranking tests for the starter and charging tests for the alternator. It says to switch off vehicle electrical devices during a charging test.

What is included?

The explicit manufacturer contents list names one VDIAGTOOL BT500 car battery tester.