--- product_id: 45916584 title: "udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red" brand: "udiag" price: "$108.09" currency: USD in_stock: false reviews_count: 8 category: "Automotive" url: https://www.desertcart.us/products/45916584-udiag-bst300-professional-car-battery-tester-12v-100-2000-cca store_origin: US region: United States of America --- # udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red **Brand:** udiag **Price:** $108.09 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red by udiag - **How much does it cost?** $108.09 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/45916584-udiag-bst300-professional-car-battery-tester-12v-100-2000-cca) ## Best For - udiag enthusiasts ## Why This Product - Trusted udiag brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Full description not available ## Features - Small compact design, scan faster and indicates test results directly. Even a beginner can use this unit to analyze any 12V batteries healthy, tells you everything about the battery: voltage, charge, cranking power, and how much life is left in the battery (level of Ohm resistance). Does it quickly and precisely - Much wider test range (100-2000 CCA, 30-200 AH) and more accurate compared to its competitors. Test results based on JIS, EN, DIN, SAE, CCA, BCI, GB, CA, MCA and IEC Standards - Provides check the Alternator's charging and Starter's cranking conditions. Vehicle charging system test is also available, including load voltage, unloaded voltage, ripple status and charging system status - The BST300 battery tester is well built with a large LCD display that has white backlight and contrast adjustment, indicates test results directly. No internal batteries required and gets the power directly from the 12V battery - It’s equipped with a 3.0 feet long cable and made of a very thick flexible insulator. There are 4 buttons on BST300, easy to use. If you are not sure whether this product fits your car, please contact us first - ›See more product details ## Images ![udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red - Image 1](https://images-na.ssl-images-amazon.com/images/I/519ND1xEokL.jpg) ![udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red - Image 2](https://images-na.ssl-images-amazon.com/images/I/41fBHK-jgHL.jpg) ![udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red - Image 3](https://images-na.ssl-images-amazon.com/images/I/41CYlFEqFUL.jpg) ![udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red - Image 4](https://images-na.ssl-images-amazon.com/images/I/51-2WUmHseL.jpg) ![udiag BST300 Professional Car Battery Tester 12V 100-2000 CCA 30-200 AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool for Red - Image 5](https://images-na.ssl-images-amazon.com/images/I/51gg23U0dyL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good tester BST300 *by D***T on January 26, 2018* Very pleased, tested 4 batteries and confirmed my suspicions. Great little tester, many useful features and simple to use. At this price I doubt you could find a better tester of similar features. In vehicle,out of vehicle as well as cranking and charging system tests. Well packaged with great instructions. Multiple tests on same battery produced consistent results. ### ⭐⭐⭐⭐⭐ Works well and convenient to have! *by A***S on September 10, 2017* Works great, as expected! I have had a lot of battery problems in my car because I don't drive too much so it's great being able to check it occasionally versus it just dying unexpectedly like in the past. Works well and definitely a good thing to keep in the car! ### ⭐⭐⭐⭐⭐ Be prepared to find out the real condition of your battery. A must for warranty claim. Impressive alternator and starter tests *by S***N on January 23, 2018* Here’s what happened when I went for warranty on it and is more typical than not, I think.1) First they said "The battery isn't charged, go home and charge it". “Can’t test a uncharged battery”They based this on the battery testers overall initial voltage no load reading, which is typical for a failing battery, even when fully charged. How do I prove it is fully charged up to its weakened capacity. Look at the BST300 State Of Charge (SOC) %. That is the % of full charge. Higher the number the more charged the battery is at its weakened capacity up to 100% full charge. With the BST300 next to me and with phone camera screen shots of tester (previous readings earlier that day) I said that’s not what I show. He accepted that and moved on. Besides, I just now took it off a 100 amp charger (cars alternator) so what logic tree branch made the conclusion it was not charged. Watch that over pruning. Maybe their Ouija board needs to be sent back for factory for calibration.Solution: BST300 would show a 95% charge if I needed to backup the undercharge claim, but it was accepted so we move on the testing.2) "Battery tests fine, no warranty". At this point they used a large and expensive looking heavy duty tester set to test the CCA capacity and compares it to the batteries rated CCA that should have been entered earlier which determines PASS or FAIL reading. A small load is placed on the battery and the CCA is extrapolated from that. Their tester was set at 700 CCA capacity battery initially (but I have a 900 CCA battery) which would have given a PASS for my failing battery instead of the FAIL I properly got.Solution: Bring your BST300 with you. BTW, their companies CCA readings and the BST300 were the same. It’s all about the CCA battery setup entered into the tester for the magic PASS FAIL reading. Also, going from say 900CCA (rating) to a current actual say 650 CCA is a larger difference than it seems. Once that number starts slipping, it’s all down hill from there. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/45916584-udiag-bst300-professional-car-battery-tester-12v-100-2000-cca](https://www.desertcart.us/products/45916584-udiag-bst300-professional-car-battery-tester-12v-100-2000-cca) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-22*