

🔋 Never get caught with a dead battery again—charge smarter, live freer!
The CTEK Indicator Eyelet M8 is a robust, easy-to-install LED battery charge indicator with an 8mm eyelet designed for permanent connection to hard-to-reach 12V lead-acid batteries. Featuring a clear red-yellow-green LED system, it instantly communicates battery health, enabling proactive charging with CTEK chargers up to 10A. Engineered in Sweden for durability and backed by a 2-year warranty, it’s the ultimate tool for busy professionals who demand hassle-free battery maintenance and peace of mind.








| ASIN | B002MT8S7E |
| Best Sellers Rank | #101,966 in Automotive ( See Top 100 in Automotive ) #453 in Battery Chargers |
| Brand | CTEK |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (3,232) |
| Date First Available | August 15, 2012 |
| Exterior | Painted |
| Global Trade Identification Number | 07350009563826 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.6 ounces |
| Item dimensions L x W x H | 3.31 x 1.73 x 3.78 inches |
| Item model number | 56-382 |
| Manufacturer | CTEK |
| Manufacturer Part Number | 56-382 |
| Min. Operating Voltage | 12 Volts |
| Model | 56-382 |
| OEM Part Number | CTK56382 |
| Position | Left |
| Power Source | Battery Powered |
| Product Dimensions | 3.31 x 1.73 x 3.78 inches |
| Safety Rating | IP65 |
| UPC | 785422840815 |
| Upper Temperature Rating | 60 Degrees Celsius |
| Voltage | 12 Volts |
R**E
Great way to be sure battery has a charge
Well built, easy to install and use with Ctek brand chargers. My wife and I don't drive our cars very often, sometimes 2 or more weeks between trips since online delivery and work-at-home are now our way of life. Problem was that newer vehicles really run down the battery, even while sitting in garage. Twice we had dead batteries (ouch!) and I was getting tired of opening hoods to check voltage, put on the charging clamps, removing and closing hood - etc. Solution was to install these connector+monitors on each vehicle. I extended the wires so the connector+monitor end comes out close to windshield - thus no need to open the hood for charging, and I can see the monitoring LEDs just by walking into the garage. I leave the newest vehicle plugged in 90% of the time, only unplugging it when the 2nd car shows "charge level Yellow" and thus needs a top-up charge. Charger is hung from ceiling, with cord easily moved from Vehicle A to Vehicle B. Real time saver, no dead batteries, and no worries about whether I got the hood properly latched each week.
M**J
Great Product
This product is a fantastic find! It's reasonably priced, making it accessible for most budgets without compromising on quality. The product is exactly as described, and its usefulness cannot be overstated. I've found it to be incredibly practical and efficient in meeting my needs. The attention to detail is impressive, and the performance is on par with more expensive alternatives. If you're looking for something reliable, well-made, and at a fair price point, this is the perfect choice. Highly recommended!
A**R
good product
good product
F**P
Indicator lights not accurate
My wife's 2004 Honda Accord with a one year old Sears Die Hard Gold was completely dead after sitting unused for nine days. I got a jump start from my insurance company's auto service and then started looking for a battery charger. I settled on the CTEK Multi US 7002 12V Battery Charger from Amazon. I also got the CTEK 93-56-382 Black Comfort Indicator Eyelet which allows quick connect and has an indicator for battery condition green - good, yellow - needs charging and red - no charge. Since this car is not driven enough to keep the battery charged this will help me avoid the afore mentioned dead battery problem in the future. The charger preformed flawlessly. I set it to Normal mode. It went through all of the charging steps - 1 Start, 2 Bulk charging, 3 Absorption charging and 4 Pulse maintenance as delineated in the owners manual. I don't know precisely how long it took because I left it connected over night. And, the bottom line, the car has started every time since charging. There are many on line reviews lauding this charger as well as those on Amazon. I am very pleased with it. The accuracy of the CTEK 93-56-382 Black Comfort Indicator Eyelet could be better. If it is red I clearly need a charge. It goes to yellow too quickly and consequently drops the green light too soon. I have concluded if it is yellow I probably do not need a charge, It does afford a very convenient connection for the charger however. Frank Camp Potomac, MD
R**R
Quick visual for battery charge status
Works perfectly. love the 3 light charge status with quick connect to the CTEK charger
U**R
My 5th Vehicle to Install this on
I have two Ctek Chargers, Both over 15+ years old and still work good as new. Just bought a new 2024 Ford and installed this for charging. If you use the charger on a somewhat regular basis and your battery will last a Longer than your memory. It would be nice if the cable was longer than a foot, (never been long enough, Ctek saved 5¢) but it's easy to splice on 2 feet to have this reach outside.
D**.
Power consumption and color thresholds
I was interested in what the current draw of this unit is, and I wanted to know what the thresholds were for the colors. I set this up with a variable DC supply and a Fluke 8060 and a Fluke 83 to measure the current and voltage. Ambient temp about 60F, and the Ctek was purchased March 2022. 3v Faint red glow 650uA 3.5v Faint flashing red 680uA spikes to 730uA 4.3v Bright flashing red 740uA spikes to 850uA 12.39v Flashing red 1.21mA spikes to 1.9mA 12.40v Flashing yellow 12.63v Flashing yellow 1.22mA spikes to 1.9mA 12.64v Flashing green 14.0v Flashing green 1.32mA The momentary current spikes were very hard to read due to the quickness of the spikes and the slow nature of the digital meter, I would take the spike current measurements with low confidence. There appeared to be no hysteresis, i.e. the thresholds were the same whether the voltage was rising or falling. I did this same test on a Ctek 56-564 Comfort Indicator Pigtail and the thresholds and currents were virtually identical. Two questions, what do you think of the current draw and what do you think of the thresholds? For the draw, if the Ctek Indicator is on a battery that is used regularly or is left on a maintainer then there is no concern, but this isn't very useful in that application. More likely you'd use this device on a piece of equipment that sits for extended periods and you'd monitor the color to get a sense of when the battery needs a maintainer. 1.2mA over the timespan of a month is about 0.86 Amp-Hours, probably not much of a consideration on a full size (car) battery but maybe significant on a smaller battery such as you'd find in a powersports application. As for the colors, I was a bit surprised by the green threshold being as high as it is. I've always thought of 12.6v as being about 100% charged, so now I'm a little less concerned when I see yellow instead of green. If you found this Helpful I'd appreciate a click - thanks.
5**0
Great product
Great product and easy to install on my 2023 Dodge Challenger. I would indeed recommend this.
H**O
Alles zat er in. Gebruik nu de klemmen voor mijn motor omdat er al twee M6 ogen op de batterij geschroefd zijn.
S**K
Polecam
N**Y
バイク、車、フォークリフトまで全部にこちらのインジケーターを取付しています。シーテックの充電器本体が一つあれば代わる代わるワンタッチで接続できます。オレンジの点滅になったら接続してます。
A**I
Good product
P**R
Suitable with bosch c3 charger, but need to reversly plug it. No issue at all......
Trustpilot
1 month ago
2 weeks ago