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The TOPDON BT600 Plus is the better pick for 24V truck diagnostics because it covers 6V, 12V and 24V with a claimed 99.8% accuracy and tests down to 2V, while the ANCEL BST500 suits light carry at 1.52 lbs and the OBDMATE BT770 leads on range at 100–2000 CCA. The BT600 Plus brings a 3.5″ screen and a 5200mAh battery for 14 hours of standalone use, against 2.8″ on the BT770 and corded-only power, and 1.52 lbs on the BST500 with no published accuracy figure.
- Choose TOPDON BT600 Plus if you need 6V support and the lowest minimum voltage — it tests batteries down to 2V.
- Choose ANCEL BST500 if you want the lightest tester for moving around a shop — just 1.52 lbs with spark-free copper clamps.
- Choose OBDMATE BT770 if you need the widest CCA range — 100–2000 CCA with a 31.5″ cable for engine bay reach.
I compared these three on battery coverage, CCA range, and onboard features like printers, display size, and power source. Everything here comes from the listed specifications rather than bench time, so the numbers speak for themselves. That covers the 6V/12V/24V split, the 100–1700 versus 100–2000 CCA spread, and the 1.52 to 4.44 lb weight gap.
🏆 Quick Picks — My Top Recommendations
Best Overall: TOPDON BT600 Plus
99.8% accuracy claim, 3.5″ screen, built-in printer and 5200mAh battery — Check Price →
Runner-Up: ANCEL BST500
Widest 100–1700 CCA range with built-in thermal printer in a 1.52 lb body — Check Price →
Best Budget: OBDMATE BT770
100–2000 CCA coverage, 2.8″ color screen and carrying case included — Check Price →
Here’s how the three testers line up on the specs that actually matter for 24V truck work.
Full Specs Comparison
| Specification | TOPDON BT600 Plus Car Bat | ANCEL BST500 12V 24V Car | OBDMATE 12V/24V Battery T |
|---|---|---|---|
| Voltage Support | 6V/12V/24V | ✅ 12V/24V | 12V/24V |
| Display Size | ✅ 3.5-Inch | — | — |
| Built-in Printer | ✅ Yes | ✅ Yes | ✅ Yes |
| Test Types | Battery, Cranking, Charging, System | Battery Health, Cranking, Charging | Charging, Cranking |
| Battery Types | — | — | ✅ Flooded, AGM, Gel, EFB |
| CCA Range | — | — | ✅ 100-2000CCA |
| Power Source | Battery Powered | — | Corded Electric |
| Item Weight | ✅ 4.44 pounds | — | 2.46 pounds |
| Color | Black Grey | — | Yellow |
| Brand | TOPDON | ANCEL | OBDMATE |
| Style | ✅ BT600 PLUS | BST500 | New |
| Resistance Test | ✅ Yes | — | — |
| Thermal Printing | — | — | ✅ Yes |
The biggest gap I see is accuracy: the TOPDON BT600 Plus claims 99.8% while the ANCEL BST500 and OBDMATE BT770 don’t publish a figure at all.
Individual Product Breakdown
I dug into each tester’s real-world strengths — accuracy claims, CCA range, screen size, and battery life — so you can see which one fits your 24V truck workflow. Here’s my honest take on all three.
TOPDON BT600 Plus Car Battery Tester
6V/12V/24V | 99.8% Accuracy | 3.5″ HD Screen | Built-in Printer | 5200mAh Battery | 4.44 lbs
- 2-in-1 Battery & Resistance Tester: TOPDON BT600 Plus battery load tester...
- 99.8% High Accuracy: Tested in rigorous lab simulations, the BT600 Plus car...
- One device covers all your testing needs: The 12V/24V system test runs...
The BT600 Plus is the most capable tester in this group, and it shows. It covers 6V, 12V, and 24V batteries, claims 99.8% accuracy, and runs resistance and sequence tests that the other two don’t offer at all. The built-in 5200mAh battery gives up to 14 hours of standalone use, and the 3.5″ screen is the biggest here. The catch is the 4.44 lb weight and the fact that it’s the priciest of the three — but for pro-level diagnostics, it earns that spot.
✅ Pros
- 99.8% accuracy claim with upgraded algorithms
- Tests batteries down to 2V — lowest minimum voltage here
- 5200mAh battery runs up to 14 hours standalone
- Sequence test handles up to 5,000 batteries in one go
❌ Cons
- Heaviest at 4.44 lbs — not a pocket carry
- Priciest option of the three
- Saves only 10 records per test type
ANCEL BST500 12V 24V Car Battery Tester with Printer
12V/24V | 100–1700 CCA | Built-in Printer | Cranking & Charging Tests | 1.52 lbs
- [Built-In Thermal Printer]: This battery load tester prints clear 12V/24V...
- [Clear Printed Results for Quick Decisions]: Printed test results show...
- [Wide Compatibility for 24V/12V Vehicles]: Test 12V/24V lead-acid batteries...
The BST500 is the lightweight pick of the bunch at just 1.52 lbs, yet it still packs a built-in thermal printer and covers 12V/24V lead-acid batteries from 100 to 1700 CCA. It handles flooded, AGM, GEL, and EFB types, and its printed reports flag GOOD, NEEDS CHARGING, or REPLACE so you don’t have to decode numbers. It’s rated 4.3 stars from 634 buyers, which tells me it holds up in real shops. The main drawback is that it starts at 12V — no 6V support like the TOPDON.
✅ Pros
- Just 1.52 lbs — easiest to carry around the shop
- Covers 100–1700 CCA across flooded, AGM, GEL, EFB
- Spark-free copper clamps with reverse polarity protection
- 634 ratings backing it up
❌ Cons
- No 6V battery support
- No published accuracy figure
- Smaller CCA ceiling than the OBDMATE
OBDMATE BT770 12V/24V Battery Tester with Printer
12V/24V | 100–2000 CCA | 2.8″ Color LCD | Built-in Printer | Carrying Case | 2.46 lbs
- 【Battery Tester for 12/24V Batteries】 BT770 Car battery tester works...
- 【One-click Battery Health Reports Printing】 Built-in thermal printer...
- 【Simple Process, Accurate Results】 BT770 accurately detects car battery...
The BT770 wins on CCA range with a 100–2000 CCA ceiling — the widest of the three — and it covers regular flooded, AGM flat plate, AGM spiral, Gel, and EFB batteries. Its 2.8″ color LCD beats the common 2.4″ screens with bigger fonts, and the 31.5″ cable gives you real reach around a 24V truck bay. It also ships with a hard carry case and two rolls of printer paper. The downside is the tiny review pool at just 39 ratings, though they average a strong 4.8 stars.
✅ Pros
- Widest CCA range at 100–2000 CCA
- 2.8″ color LCD with bigger fonts and higher resolution
- 31.5″ cable for extra reach in the engine bay
- 4.8 stars, hard carry case, and 7 menu languages
❌ Cons
- Only 39 ratings so far — less proven track record
- No 6V battery support
- Corded power only, no built-in battery
Which One Should You Buy?
There’s no single winner for everyone here — it really depends on whether you value accuracy, portability, or CCA headroom most. I’ve matched each tester to the buyer it fits best so you can pick with confidence.
TOPDON BT600 Plus Car Battery Tester is right for you if…
- You run a busy shop and need the 99.8% accuracy claim plus resistance and sequence tests for high-volume battery checks
- You want to test 6V batteries too, not just the 12V/24V truck rigs in your bay
- You need up to 14 hours of standalone runtime from the 5200mAh battery and a big 3.5″ screen
ANCEL BST500 12V 24V Car Battery Tester with Printer is right for you if…
- You want a tester you can carry all day — it weighs just 1.52 lbs
- Your 24V truck batteries sit in the 100–1700 CCA range and you want clear GOOD / NEEDS CHARGING / REPLACE printouts
- You prefer a model with a proven 634-rating track record and spark-free copper clamps
OBDMATE BT770 12V/24V Battery Tester with Printer is right for you if…
- You work on big 24V batteries up to 2000 CCA and need the widest range of the three
- You want a 2.8″ color LCD with bigger fonts and a 31.5″ cable for reaching into tight engine bays
- You value a hard carry case, 7 menu languages, and a 4.8-star average from early buyers
❌ Who Should Skip All of These?
If you only ever test standard 12V car batteries and never touch 24V trucks, you’d be paying for capability you don’t need — a basic 12V-only tester would do the job for less. And if you want app-based logging with long-term history on your phone, none of these three connect to a phone, so you’d want a Bluetooth-enabled tester instead.
For the most common 24V truck buyer, I’d grab the TOPDON BT600 Plus if accuracy and pro features matter most, but if you want the best value with a lighter body, the ANCEL BST500 is my pick. Either way, check the current price on Amazon before you commit.
Frequently Asked Questions
Which battery tester is best for 24V trucks — TOPDON BT600 Plus, ANCEL BST500, or OBDMATE BT770?
For pure 24V truck work, I’d rank the OBDMATE BT770 first for range since it handles 100–2000 CCA, the widest of the three. The TOPDON BT600 Plus wins on accuracy at a claimed 99.8% and adds resistance and sequence tests the others lack. The ANCEL BST500 is the best value with a 100–1700 CCA range and just 1.52 lbs of weight. If you want one answer: TOPDON for pros, OBDMATE for maximum CCA reach.
Is the TOPDON BT600 Plus worth the extra money over the ANCEL BST500?
Yes, if you need the extras — the BT600 Plus claims 99.8% accuracy, tests 6V batteries down to 2V, and runs up to 14 hours on its 5200mAh battery. The BST500 tops out at 12V/24V and 1700 CCA with no published accuracy figure. But if you only test standard 12V/24V truck batteries, the ANCEL does the job for far less. The TOPDON earns its price for shops doing high-volume or precision work.
Does the ANCEL BST500 test 6V batteries like the TOPDON BT600 Plus?
No — the ANCEL BST500 starts at 12V, so it won’t test 6V batteries at all. The TOPDON BT600 Plus is the only one of the three that covers 6V, 12V, and 24V, and it can even read batteries as low as 2V. If 6V support matters to you, the BST500 and the OBDMATE BT770 are both out.
Which tester has the widest CCA range for heavy-duty 24V batteries?
The OBDMATE BT770 wins this one with a 100–2000 CCA range, beating the ANCEL BST500’s 100–1700 CCA. The TOPDON BT600 Plus doesn’t publish a CCA ceiling in its listed specs, so I can’t compare it directly there. For big truck and heavy-duty batteries near the top of the scale, the BT770 is the safest pick.
Do all three testers print paper reports without an app?
Yes — all three have a built-in thermal printer and none of them need a phone, app, or ink cartridges. The ANCEL BST500 prints clear GOOD, NEEDS CHARGING, or REPLACE statuses, and the OBDMATE BT770 prints one-tap reports for cranking, charging, and battery tests. The TOPDON BT600 Plus also prints instantly and includes 5 rolls of thermal paper in the box.
Which battery tester is easiest to carry around a truck bay?
The ANCEL BST500 is the lightest at just 1.52 lbs, which makes it the easiest to move from truck to truck. The OBDMATE BT770 comes in at 2.46 lbs and includes a hard carry case, while the TOPDON BT600 Plus is the heaviest at 4.44 lbs. If portability is your priority, the ANCEL is the clear winner.
My Final Verdict
After weighing all three, the TOPDON BT600 Plus is my overall winner for 24V truck work. It’s the only tester here that covers 6V, 12V, and 24V, it claims 99.8% accuracy, and its 5200mAh battery runs up to 14 hours standalone. The ANCEL BST500 is my runner-up and the best pick for anyone who wants a light 1.52 lb tester with a proven 634-rating history. The OBDMATE BT770 is the value choice if you need the widest 100–2000 CCA range.
If you’re on the fence, decide on accuracy versus price. Need lab-grade precision and 6V support? Go TOPDON. Want the lightest, most affordable option that still handles 24V trucks? Go ANCEL. Need maximum CCA headroom? Go OBDMATE.
WINNER: TOPDON BT600 Plus
- 2-in-1 Battery & Resistance Tester: TOPDON BT600 Plus battery load tester...
- 99.8% High Accuracy: Tested in rigorous lab simulations, the BT600 Plus car...
- One device covers all your testing needs: The 12V/24V system test runs...
Best for pros and shops that need 99.8% accuracy, 6V/12V/24V coverage, and up to 14 hours of standalone runtime.
RUNNER-UP: ANCEL BST500
- [Built-In Thermal Printer]: This battery load tester prints clear 12V/24V...
- [Clear Printed Results for Quick Decisions]: Printed test results show...
- [Wide Compatibility for 24V/12V Vehicles]: Test 12V/24V lead-acid batteries...
Best for mobile techs and DIYers who want a light 1.52 lb tester with a proven 634-rating track record.
BEST VALUE: OBDMATE BT770
- 【Battery Tester for 12/24V Batteries】 BT770 Car battery tester works...
- 【One-click Battery Health Reports Printing】 Built-in thermal printer...
- 【Simple Process, Accurate Results】 BT770 accurately detects car battery...
Best for heavy-duty 24V batteries up to 2000 CCA, with a 2.8″ color screen and hard carry case.
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