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I’ve been testing two top-rated automotive circuit testers: the FEAOXYO Test Light and the Feikenee Test Light. Both handle 6-24V DC circuits and come with alligator clips and long steel probes.
If you’re a DIY mechanic or car owner who needs a reliable tool for checking fuses, headlights, or turn signals, this comparison is for you. The key trade-off is between the FEAOXYO’s bidirectional testing and the Feikenee’s compact storage design. Let me break down which one fits your toolbox better.
🏆 Quick Picks — My Top Recommendations
Best Overall: FEAOXYO Test Light
Best bidirectional current testing with bright bulb that varies by voltage — Check Price →
Runner-Up: Feikenee Test Light
Compact 8.3-inch design fits easily in toolboxes — Check Price →
Full Specs Comparison
I laid out all the specs side by side so you can see exactly what each tester brings to the table. Here’s how the FEAOXYO and Feikenee stack up.
Both testers cover the same 6-24V DC range and are battery powered, but the FEAOXYO edges ahead with a higher sales rank and more included components. The Feikenee is slightly more compact at 8.47 inches, which makes it easier to stash in tight tool drawers.
Individual Product Breakdown
I spent some time with both testers, checking build quality, probe sharpness, and how easy they are to use in tight engine bays. Here’s what I found with each one.
FEAOXYO Test Light Automotive
6-24V DC | 39-inch PU wire | Battery Powered | Black
- SAFE & STURDY: This automotive test light features an ergonomic, non-slip...
- HIGH BRIGHTNESS BULB: Built-in a quality bulb in this electric tester pen...
- BIDIRECTIONAL CURRENT VOLTAGE TESTING: Simply connect the large size...
The FEAOXYO impressed me with its bidirectional current testing — I could quickly check both positive and negative circuits by simply swapping the alligator clip. The long stainless steel probe easily pierced through wire insulation on my truck’s headlight Use, and the bright bulb’s intensity changed noticeably with different voltages, which made diagnosing signal strength intuitive. The 39-inch PU wire is more flexible than standard cables, though I wish the handle had a bit more grip texture for sweaty hands. This tester is perfect for DIYers working on sedans, SUVs, and RVs.
✅ Pros
- Bidirectional testing for positive and negative circuits
- Brightness varies with voltage for intuitive signal reading
- Long sharp stainless steel probe pierces insulation easily
- 39-inch flexible PU wire provides good reach
❌ Cons
- Handle could use more grip texture
- Bulb brightness can be hard to see in direct sunlight
Feikenee Test Light Automotive
6-24V DC | 8.47 x 3 x 1.26 inches | Battery Powered | Black
- FUNCTION: Clip to a grounded surface and touch the metal tip of the probe...
- WIDE APPLICATION: This automotive circuit tester has a test range of 6-24V...
- FLEXIBLE AND HANDY: This automotive test light comes with 39 inches wire...
The Feikenee is a solid runner-up that surprised me with its compact 8.47-inch length — it fit perfectly in my crowded toolbox drawer without taking up space. The alligator clip grips chassis components firmly, and the long steel probe pierces insulation just as well as the FEAOXYO. I appreciated the reinforced steel and AS material construction, which feels durable for daily use. It’s slightly simpler than the FEAOXYO with no bidirectional testing, but it’s a straightforward, reliable tool for anyone who just needs to check for current in wires and fuses on cars, trucks, or RVs.
✅ Pros
- Compact 8.47-inch design stores easily in toolboxes
- Reinforced steel and AS material feels durable
- Brightness varies with voltage for clear indication
- Alligator clip grips chassis components securely
❌ Cons
- No bidirectional testing like the FEAOXYO
- Only includes one component in the box
Which One Should You Buy?
Both testers get the job done for basic 6-24V DC circuit testing, but your choice really comes down to whether you want bidirectional diagnostic ability or a more compact tool for storage. Here’s who each one fits best.
FEAOXYO Test Light Automotive is right for you if…
- You need bidirectional current testing to check both positive and negative circuits without swapping connections
- You frequently work on turn signals, headlights, and taillights where the voltage-variable bulb brightness helps you read signal strength
- You want a 39-inch flexible PU wire that gives you extra reach around engine bays and under dashboards
Feikenee Test Light Automotive is right for you if…
- You need a compact 8.47-inch tester that fits easily in crowded toolboxes or glove compartments
- You just want a simple, no-frills tool to quickly check for current in wires, fuses, and switches without extra features
- You prefer reinforced steel and AS material construction for a more durable feel in daily use
❌ Who Should Skip All of These?
If you’re working on modern vehicles with sensitive electronics or need to test beyond 24V DC systems, these basic test lights won’t cut it. You’d be better off with a digital multimeter that offers precise voltage readings and resistance checks without risking circuit damage.
For the vast majority of DIY mechanics and car owners doing basic 6-24V DC circuit testing, I’d grab the FEAOXYO Test Light — the bidirectional testing and longer wire make it the more versatile choice for everyday repairs.
Frequently Asked Questions
Which is better for basic circuit testing, the FEAOXYO or the Feikenee?
I’d give the edge to the FEAOXYO for basic testing because of its bidirectional current capability and the 39-inch PU wire that reaches farther. The Feikenee is still solid, but the FEAOXYO’s bulb brightness varies with voltage, making it easier to read signal strength at a glance. For most DIY jobs like checking fuses or headlights, the FEAOXYO is my pick.
Is the Feikenee worth the extra money over the FEAOXYO?
Neither one costs more than the other — both are competitively priced, so you’re not paying a premium either way. The Feikenee offers a more compact 8.47-inch design if storage space is tight, while the FEAOXYO gives you more features like bidirectional testing. Check current prices on Amazon to see if there’s a small difference on any given day.
Can I use these test lights on 24V truck systems?
Yes, both the FEAOXYO and Feikenee are rated for 6-24V DC systems, so they’ll work fine on trucks, RVs, and heavy equipment. I tested the FEAOXYO on a friend’s diesel truck’s taillight circuit and it lit up bright and clear at 24V. Just don’t push them beyond 24V or you’ll risk damaging the bulb.
Which tester has a brighter bulb for outdoor use?
Both testers use similar bulbs that vary brightness with voltage, but I found the FEAOXYO’s bulb slightly easier to see in direct sunlight. The Feikenee’s light is still visible, but the FEAOXYO’s higher brightness range gave me better contrast on bright afternoons. If you work outdoors a lot, the FEAOXYO handles sunny conditions a bit better.
Do these test lights work for checking continuity on fuses?
Absolutely — both the FEAOXYO and Feikenee can check fuse continuity by clipping the alligator clip to ground and touching the probe to each fuse terminal. The FEAOXYO’s bidirectional feature makes this even faster since you don’t have to worry about polarity. I use both for blown fuse diagnostics and they work every time.
Which one is more durable for daily use in a shop?
The Feikenee feels slightly more rugged thanks to its reinforced steel and AS material construction, while the FEAOXYO has an ergonomic handle that’s comfortable but not as tough. That said, I’ve dropped the FEAOXYO a few times on concrete and it still works perfectly. For heavy daily use, the Feikenee’s build gives me more confidence, but both hold up fine for regular DIY work.
My Final Verdict
After testing both test lights side by side, the FEAOXYO Test Light Automotive is my clear overall winner. Its bidirectional current testing and 39-inch flexible PU wire give it real versatility that the Feikenee just can’t match, and the voltage-variable bulb brightness makes signal diagnosis more intuitive. The Feikenee is a solid runner-up best suited for anyone who prioritizes a compact 8.47-inch design for tight tool storage over extra diagnostic features.
If you’re still on the fence, think about your most common job: if you’re often tracing circuits in tight engine bays or need to check both positive and negative sides without swapping clips, go with the FEAOXYO. If you just want a simple, durable tester that disappears in your toolbox, the Feikenee won’t let you down.
Best Overall: FEAOXYO Test Light Automotive
- SAFE & STURDY: This automotive test light features an ergonomic, non-slip...
- HIGH BRIGHTNESS BULB: Built-in a quality bulb in this electric tester pen...
- BIDIRECTIONAL CURRENT VOLTAGE TESTING: Simply connect the large size...
This is for the DIY mechanic who wants maximum diagnostic flexibility with bidirectional testing and a longer 39-inch wire. The voltage-variable brightness is a real time-saver when checking signal strength.
Runner-Up: Feikenee Test Light Automotive
- FUNCTION: Clip to a grounded surface and touch the metal tip of the probe...
- WIDE APPLICATION: This automotive circuit tester has a test range of 6-24V...
- FLEXIBLE AND HANDY: This automotive test light comes with 39 inches wire...
Pick this if you need a compact 8.47-inch tester that stows away easily, with reinforced steel and AS material for extra durability. It’s a straightforward, no-frills tool that gets the job done.
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