265 Change battery on RS265 Start/Stop

Discussion in 'Electrical & Interior - Security, ICE, Wiring Loom' started by E-A, Mar 5, 2023.

  1. E-A


    Changed the battery yesterday and found something that not looked right.

    The Battery Charging Control Module has a connector which seems to have its cable cut off?
    I would appreciate if someone can check if there is a cable attached to this connector?


    The manual doesn’t mention how to change battery more than something along the lines of “It’s complicated, call your main dealer”

    My Meg is parked up in the garage during winter and I use a tickle charger, approximately once a month, this time it wouldn’t charge properly. Stopped charging at 10,2V. Looked around and youtube provided good enough information (I think)

    My step-by-step could be a guide when people search in the future. Please comment if anything seems wrong/not necessary.

    1) Unlock the car with the button on the key
    2) Pull the handbrake – Put gear in neutral
    3) Wait a few minutes to let the car "fall into sleep"
    4) Disconnect grey connector

    5) Disconnect negative terminal
    6) Disconnect positive terminal

    7) Remove clamp (8 mm socket), let the screws stay in the clamp, make sure you don´t drop them when removing the clamp.

    8) Clean battery tray

    9) Put in new battery, I cleaned up terminals with Brakleen and Electronic Cleaner. Battery manual recommend to use vaseline after terminals are connected but I didn't find any trace of vaseline on my old battery so I haven't put anything on the new one. Maybe I should.

    10) Refit in reverse order

    11) Choose “New battery” with trip computer buttons and press and hold one of them to confirm

    The new battery is EXIDE EK700 AGM 70Ah and the specifications says it should be charged with 14,4V instead of 14,7V which I believe is more common when it comes to AGM batterys. In my case, I will use standard mode on my tickle charger instead of AGM mode.

    Manual says "The battery may need recharging when voltage drops below 12.4V"
    12 hours after fully charged the battery is at 12,8V, I will keep an eye on this one to see if recharging once a month is enough.

    2015 Megane RS265
    Wagner Intercooler
    Forge Uprated Turbo Recirc Valve
    van Loon 3" Downpipe incl 200 cell HJS Euro5
    3" Scorpion exhaust non-res
    Engine Dynamics remap
    Cooksport lowering springs
  2. nothing connected on my RS250
    E-A likes this.
  3. E-A


    Thanks! I will now stop worry about it.

  • Share This Page

    1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
      By continuing to use this site, you are consenting to our use of cookies.