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The ANCEL BST500 is the better pick for most auto shops because its 100–1700 CCA range covers the common 12V and 24V lead-acid batteries a bay sees, while the OBDMATE BT770 suits techs who need the wider 100–2000 CCA ceiling for larger diesel batteries. The ANCEL covers 100–1700 CCA at 1.52 lbs, while the OBDMATE reaches 2000 CCA at 2.46 lbs with a 2.8″ color LCD.
- Choose the ANCEL BST500 if you want the lightest tester of the two that still handles daily shop work — 1.52 lbs with reverse polarity protection and a built-in thermal printer that needs no app or ink.
- Choose the OBDMATE BT770 if you work on the biggest diesel batteries and want an easier-to-read screen — a 100–2000 CCA range and a 2.8″ color LCD with larger fonts, plus a hard carry case and 2 paper rolls included.
I compared these two on CCA range, display size, and what ships in the box, using only the listed specifications. I also looked at battery type coverage, since flooded, AGM, GEL, and EFB support matters in a shop that sees mixed vehicles.
🏆 Quick Picks — My Top Recommendations
Best Overall: ANCEL BST500
634 ratings and a proven 4.3-star track record for shop work — Check Price →
Runner-Up: OBDMATE BT770
2.8″ color LCD and a 4.8-star rating, plus a hard carry case included — Check Price →
Here’s how the ANCEL BST500 and the OBDMATE BT770 stack up side by side on the specs that actually matter in a shop.
Full Specs Comparison
| Specification | ANCEL BST500 12V 24V Car | OBDMATE 12V/24V Battery T |
|---|---|---|
| Voltage | ✅ 12V, 24V | 12V, 24V |
| CCA Range | — | ✅ 100-2000CCA |
| Battery Types | — | ✅ Flooded, AGM, Gel, EFB |
| Test Functions | Health, Cranking, Charging | Charging, Cranking |
| Printer | ✅ Yes | Thermal Printing |
| Display Type | — | — |
| Power Source | — | ✅ Corded Electric |
| Item Weight | — | ✅ 2.46 pounds |
| Color | — | ✅ Yellow |
| Style | — | ✅ New |
| Brand | ANCEL | OBDMATE |
| Model | BST500 | ✅ BT770 |
| Application | Cars, Trucks, Motorcycles | Automotive |
| Alternator Test | ✅ Yes | ✅ Yes |
| Load Test | ✅ Yes | ✅ Yes |
The biggest gap I noticed is weight and screen size: the OBDMATE BT770 is heavier at 2.46 pounds but gives you a larger 2.8″ color display, while the ANCEL BST500 stays lighter at 1.52 pounds with a bigger review base behind it.
Individual Product Breakdown
I focused on the specs that actually change your day in a shop: CCA range, battery type coverage, screen readability, and how the printed reports work. Here’s my honest take on each one.
ANCEL BST500 12V 24V Car Battery Tester with Printer
12V/24V | 100–1700 CCA | Built-in thermal printer | 1.52 lbs | 4.3 stars (634 ratings)
- [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...
I like the ANCEL BST500 because it does the three tests a shop actually needs: battery health, cranking, and charging. It handles 12V and 24V lead-acid batteries from 100–1700 CCA, covering flooded, AGM, GEL, and EFB. The built-in thermal printer spits out reports in seconds with a clear GOOD, NEEDS CHARGING, or REPLACE status, and you don’t need a phone, app, or ink. The main limitation is the CCA ceiling sits at 1700 rather than 2000, so the biggest diesel rigs may fall outside its range.
✅ Pros
- 634 ratings give it a long, proven track record
- Prints 12V/24V reports with no app or ink needed
- Covers flooded, AGM, GEL, and EFB batteries
- Light at 1.52 lbs with reverse polarity protection
❌ Cons
- 1700 CCA ceiling misses the largest diesel batteries
- 4.3 stars is solid but not class-leading
OBDMATE 12V/24V Battery Tester with Printer OBDMATE BT770
12V/24V | 100–2000 CCA | 2.8″ color LCD | Thermal printer | 2.46 lbs | 4.8 stars (39 ratings)
- 【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 OBDMATE BT770 wins on display and range. Its 2.8″ color LCD is bigger than the common 2.4″ screens, with larger fonts and higher resolution, so readings are easy to scan in a busy bay. It pushes the CCA range to 2000 and covers regular flooded, AGM flat plate, AGM spiral, Gel, and EFB batteries, plus it comes with a hard carry case and two rolls of paper. The catch is the review count: only 39 ratings so far, so the long-term reliability picture isn’t as clear as the ANCEL’s.
✅ Pros
- 2000 CCA range covers bigger diesel batteries
- 2.8″ color LCD with bigger fonts than 2.4″ screens
- 4.8-star rating across 39 reviews
- Ships with a hard carry case and 2 paper rolls
❌ Cons
- Only 39 ratings, so less proven over time
- Heavier at 2.46 lbs than the ANCEL
Which One Should You Buy?
Honestly, the “best” pick comes down to whether you value a proven track record or the newest display tech. Both test 12V and 24V batteries and both print reports, so the split is really about range, screen size, and how much trust you put in review counts.
ANCEL BST500 is right for you if…
- You want a tester with 634 ratings behind it, so you know how it holds up in real shops
- Your bays mostly see cars, trucks, motorcycles, SUVs, ATVs, and RVs under 1700 CCA
- You prefer a lighter 1.52 lb unit that’s easy to hand around the shop
OBDMATE BT770 is right for you if…
- You work on big diesel rigs and need the full 2000 CCA range
- You want a 2.8″ color LCD with bigger fonts that’s easier to read in low light
- You like getting a hard carry case and two paper rolls right in the box
❌ Who Should Skip All of These?
If you only test a single car battery once a year at home, a basic voltage meter or a cheap digital tester is plenty. These two are built for repeat shop use, with printers and thermal paper you’d rarely need as a casual DIYer.
For most auto shops, I’d go with the ANCEL BST500 because its 634 ratings give me confidence it holds up, and 1700 CCA covers the vast majority of vehicles. But if you regularly handle the biggest diesel batteries, the OBDMATE BT770 and its 2000 CCA range is the smarter call.
Frequently Asked Questions
Which is better for auto shops, the ANCEL BST500 or the OBDMATE BT770?
For most shops, I’d pick the ANCEL BST500 because its 634 ratings give me a much clearer picture of long-term reliability than the OBDMATE’s 39. Both test 12V and 24V batteries and both print reports, so the ANCEL’s proven track record wins for everyday use. The one case where I’d flip to the OBDMATE is if you regularly service the biggest diesel batteries, since it reaches 2000 CCA versus the ANCEL’s 1700.
Is the OBDMATE BT770 worth it over the ANCEL BST500 for bigger diesel batteries?
Yes, if 1700 to 2000 CCA matters to you. The OBDMATE BT770 covers the full 100–2000 CCA range, which means it can test the largest diesel batteries the ANCEL BST500 tops out below. For a shop that sees heavy trucks, that extra 300 CCA of headroom is the whole reason to pay more. If your bays mostly see cars and light trucks, though, the ANCEL handles those just fine.
Does the ANCEL BST500 have a bigger screen than the OBDMATE BT770?
No, the OBDMATE BT770 actually wins here with its 2.8″ color LCD, which is bigger than the common 2.4″ screens and has larger fonts and higher resolution. The ANCEL BST500 doesn’t list a screen size in its specs, so I can’t claim it matches the OBDMATE’s readability. If a bright, easy-to-scan display matters in your shop, the OBDMATE has the edge.
Do both testers print battery reports without an app?
Yes, both have built-in thermal printers and neither needs a phone or app. The ANCEL BST500 prints 12V/24V reports in seconds with a clear GOOD, NEEDS CHARGING, or REPLACE status and no ink or cartridges. The OBDMATE BT770 does one-tap printing during cranking, charging, and battery tests, and it even ships with two rolls of paper while the ANCEL includes one.
Which tester covers more battery types, the ANCEL BST500 or the OBDMATE BT770?
The OBDMATE BT770 covers slightly more. It lists regular flooded, AGM flat plate, AGM spiral, Gel, and EFB, while the ANCEL BST500 lists flooded, AGM, GEL, and EFB. In practice both handle the common chemistries you’ll see in a shop. The OBDMATE just spells out AGM spiral coverage separately, which matters if you work on those specific batteries.
Is the ANCEL BST500 easier to carry around the shop?
Yes, it’s noticeably lighter at 1.52 pounds versus the OBDMATE BT770 at 2.46 pounds. That weight difference makes the ANCEL easier to hand between bays or hold while reaching into an engine compartment. The OBDMATE offsets this a bit by including a hard carry case, so it’s more about how you prefer to move the tool around.
My Final Verdict
After weighing both, the ANCEL BST500 is my overall winner for auto shops. Its 634 ratings give me real confidence it holds up to daily use, it covers 100–1700 CCA across flooded, AGM, GEL, and EFB batteries, and it stays light at 1.52 pounds. The OBDMATE BT770 is the better pick only for shops that regularly test the biggest diesel batteries, thanks to its 2000 CCA range and 2.8″ color LCD.
If you’re on the fence, ask one question: do you ever test batteries above 1700 CCA? If yes, the OBDMATE’s extra range is worth it. If you mostly work on cars and light trucks, the ANCEL’s proven track record and lighter build make it the safer buy.
WINNER: 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 most auto shops that want a proven, lightweight tester with 634 ratings behind it. It handles 12V/24V batteries from 100–1700 CCA and prints reports with no app needed.
RUNNER-UP: 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 shops that service large diesel batteries, with a full 100–2000 CCA range and a 2.8″ color LCD. It also ships with a hard carry case and two paper rolls.
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