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The CTEK 40-165 Battery Charge Indicator offers a simple, LED traffic light display to instantly show your 12V vehicle battery’s health via the accessory socket. Featuring the innovative CTEK CONNECT system, it enables quick, secure connection without opening the bonnet. Compatible with all 12V lead-acid batteries and CTEK chargers up to 8A, this durable, Swedish-tested device ensures you know exactly when to charge, backed by a 2-year warranty for dependable use.




| ASIN | B06XXDMGW3 |
| Amperage | 8 Amps |
| Best Sellers Rank | 15,595 in Automotive ( See Top 100 in Automotive ) 70 in Electric Vehicle Charging Station Accessories |
| Box Contents | Battery charge indicator with 12 V plug |
| Brand | CTEK |
| Brand Name | CTEK |
| Colour | yellow |
| Compatible Devices | Vehicles with 12 V accessory socket and CTEK chargers from the CT5 series |
| Connector Types | 12V cigarette lighter plug |
| Country of Origin | China |
| Current Rating | 8 Amps |
| Customer Reviews | 4.4 out of 5 stars 912 Reviews |
| EU Spare Part Availability Duration | 1 Years |
| Global Trade Identification Number | 07340103401650 |
| Input Voltage | 12 Volts |
| Input voltage | 12 Volts |
| Item Dimensions D x W x H | 31D x 6W x 5H centimetres |
| Item Type Name | Battery monitor with 12 V plug |
| Item Weight | 0.05 Kilograms |
| Item weight | 0.05 Kilograms |
| Manufacturer | CTEK |
| Manufacturer Part Number | 40-165 |
| Model Number | 40-165 |
| Number of Ports | 1 |
| Output Voltage | 12 Volts |
| Output voltage | 12 Volts |
| Product dimensions | 31D x 6W x 5H centimetres |
| Unit Count | 1 count |
S**G
Easy charger
This is such a great gadget you can charge you vehicle battery without opening the bonnet
I**N
CTEK Battery charge Indicator
Gives a good indication on the state of your battery, but not as accurate as a handheld battery checker. What it is great for though is being able to charge the battery through the 12v socket instead of having to attach cables to the battery.
G**K
Grea
I bought this as an add-on to my CTEC charger as an emergency fix, because the engine compartment (bonnet/hood) lid has an electronic catch. If the battery fails you can't get to it to charge it directly as the catch doesn't work! Having this gadget allows a re-charge from inside the car and avoids the trouble of having to "jump" the catch from an auxiliary battery. So, it does what I want. I don't find the indicator lights particularly useful in assessing the state of the battery in so far as they're over-pessimistic and don't really align with those on the CTEC charger. There's plenty of charge in the battery when they're flashing amber and still enough to start the car when flashing red. Following the lights would have you charging the car all the time. I don't particularly like charging the battery through the cig-lighter/power point as it's running through the fuse box. I normally use the CTEC accessory lead with eyelets at one end that you permanently connect to the battery and a CTEC connector trailing out of the battery box at the other to connect to the charger. This is very useful and saves having to remove the battery cover every time and simplifies things, assuming that the electronic bonnet catch will open in the first place!
K**N
Great item and service
Great item and service
M**N
Easy to use
Easy to use as plugs into cigarette lighter socket. Saves the hassle of accessing battery
M**X
12v auxiliary charger cable
Works well. Its a must have , if you have a Ctek charger.
S**.
Fantastic item
Perfect
A**D
didnt work for me but was original and well packaged
didnt work on my bike so returned but seems well made
A**R
Solución de carga conveniente para el encendedor de cigarrillos, indicación luminosa clara.
La capacidad de conectarse rápidamente a través del enchufe del encendedor significa que no tiene que preocuparse por acceder a la batería. La conexión tarda sólo unos segundos, lo que hace que su uso sea intuitivo incluso para aquellos que no están familiarizados con los detalles técnicos. El material de la carcasa no sólo proporciona protección sino también facilidad de uso. La goma suave y elástica evita que el dispositivo se resbale sobre cualquier superficie, incluido metal, plástico o cuero. La indicación luminosa le permite evaluar rápidamente el estado de la batería. Un simple “semáforo” (rojo, amarillo, verde) deja claro si es necesario cargar la batería. Esto es conveniente para quienes rara vez usan sus vehículos o los dejan por mucho tiempo. Además, el indicador puede advertir de posibles problemas con la batería, como una descarga por debajo de un nivel crítico. El dispositivo se puede quitar, mover o conectar a otro vehículo fácilmente. Adecuado para usar con modelos de cargadores populares como CTEK. Compatible con una amplia gama de accesorios (como cables de extensión y soportes), este dispositivo ahorra tiempo y esfuerzo al eliminar la necesidad de abrir el capó para verificar y cargar la batería. Esto es especialmente cierto en el caso de los automóviles en los que el acceso a la batería es difícil. Para los automóviles donde la toma del encendedor se apaga cuando se apaga el encendido, es inútil.
P**N
Gift / Gåva.
Gift / Gåva.
M**E
Accu opladen via 12 volt aansluiting, top!
Ideaal! De accu kan ik nu via de 12 volt aansluiting opladen! Werkt zoals ik had gehoopt!
P**O
PRATICO E FUNZIONALE
Adattatore per il mio CTEK, che utilizzo per individuare la carica della batteria e per collegare il manutentore all'occorrenza. funzionale, pratico e ben fatto.
B**E
Chargeur batterie
Excellent chargeur
Trustpilot
4 days ago
2 months ago