Pic. 1.114. Replacing the power element of the Renault card: 1 - spare key; 2 - battery
Remove, over resistance, spare key 1 (pic. 1.114).
Replace battery 2 observing the polarity indicated on the key.
After this operation, the message «Card battery needs to be replaced» not shown on the instrument cluster display.
Note. The battery life is about two years.