CTEK Indicator Eyelet M8 8 mm — Battery LED Charge Indicator with Three‑Colour LED, Permanent On‑Vehicle Connection

This compact accessory combines a secure, hardwired eyelet with a simple traffic‑light LED indicator so you can monitor batteries that are hard to reach or used across multiple vehicles. The eyelet fits 8 mm posts and works with all 12V lead‑acid chemistries and CTEK chargers up to 10 A, providing a tidy permanent fit that stays connected and protected by a snap‑on end cap when not in use. Built and tested in Sweden, the cable and connector are engineered for long life and straightforward use.

How does the LED indicator tell me the battery condition?

The indicator uses three colored LEDs to show approximate state of charge so you can decide whether charging is needed. Colors are intuitive and designed for quick decisions without meters or apps.

• Red = less than ~60% charge (charge now).
• Yellow = roughly 60–80% charge (charge soon).
• Green = above ~80% charge (charging not required).

Can I leave the CTEK Indicator Eyelet M8 permanently attached?

Yes — it’s intended for a permanent, semi‑permanent or long‑term connection to batteries that are difficult to access. The eyelet design and included end cap protect the connection when not in use and permit on‑vehicle mounting.

• 8 mm eyelet for secure bolted attachment to battery posts.
• Durable, flexible cable tested for repeated use and exposure.
• Snap‑on protective cap keeps terminals clean and safe between uses.

Will this work with my charger and battery type?

The Indicator Eyelet M8 is compatible with all 12V lead‑acid battery types and works with CTEK chargers rated up to 10 A. It is not a charger itself — it simply displays battery charge level and provides the CTEK CONNECT interface for a quick connection.

• Compatible with start‑stop, AGM, MF, GEL and conventional 12V lead‑acid batteries.
• Designed for use with CTEK chargers up to 10 A via the CONNECT system.
• Not a replacement for a charger — use it alongside a compatible CTEK charger.

How durable and serviceable is the indicator eyelet?

CTEK designed the eyelet and cable for longevity with flexible, hard‑wearing materials tested in Sweden. The unit is covered by CTEK’s limited warranty; retain your purchase receipt and consult local warranty terms for full details.

• Swedish design and testing for rugged use and cable flexibility.
• Sealed LED housing and protective end cap to reduce corrosion risk.
• Simple installation; repair or opening by unauthorized parties may void warranty.

Who is this for: The CTEK Indicator Eyelet M8 is ideal for vehicle owners, fleet operators, seasonal vehicle caretakers and anyone who needs a tidy, permanent battery access point with a clear visual charge status. It’s particularly useful for motorcycles, boats, caravans, classic cars and vehicles with hard‑to‑reach battery terminals where a quick health check without tools is valuable.