2016 Citroen Picasso change key battery HOW TO - YouTube
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RKFUK® - Citroen DIY Repair Kit - Replacement 3 Button Remote Car Key Fob Case with Flip
Car Key Fob Battery For Citroen Flip Key C2 C3 C4 C5 C6 C8 Fast P&P 1 X CR1620 5000394030367 | eBay
Jongo Key case without blade, compatible with Citroen C4 Picasso, C4 Grand Picasso, C5, CE0536, with 1 x Maxell CR1620 battery, 3 key case for car keys : Amazon.nl: Electronics & Photo