Fit a Porsche one. Only about £10 more usually.
If you want the battery to last longer leave the car unlocked, but typically 3 weeks is about as much as you'll get.
Lots of folk fit a simple switch on the -ve that they flick if they're parking up for a while.
Or you could go retro: https://www.demon-tweeks.co.uk/motorsport/battery-isolators-master-switches/bosch-battery-cut-off-switch-historic-porsche-type
Any different from a 'normal' battery?
What size is the battery bay?
Says PORSCHE on it in big letters.
This wins you 80 anorak points at Porsche meetings.
@lynx started
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Fit a Porsche one. Only about £10 more usually.
If you want the battery to last longer leave the car unlocked, but typically 3 weeks is about as much as you'll get.
Lots of folk fit a simple switch on the -ve that they flick if they're parking up for a while.
Or you could go retro: https://www.demon-tweeks.co.uk/motorsport/battery-isolators-master-switches/bosch-battery-cut-off-switch-historic-porsche-type