Or you can use a plastic spudger if you want to avoid marking the fob.
Usually a single battery in the later D2 fobs I think, a CR2032 (ie 20mm dia, 3.2mm thick).
CR2032 is a very common size that are also used for BIOS memory retention on computer motherboards, so most electronics/computer places stock them.
Kinda ironic Stephen, don't you think, that you own an EV yet it's your petrol-driven vehicle that's had all the battery issues lately
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Mark
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2002 FE S8 Ebony Black Pearl
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Cars Owned:
The Tesla Era: 2020 Model S Performance Ludicrous+ (present)
(Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability)
The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present)
The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo
The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust