From Jo Landolfo’s guide · Section 16.1
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- Recharge monthly.
- Replace every 12–18 months.
- Check spare tire pressure monthly.
- Keep in glove box.
- Test batteries every 3 months.
- Inspect yearly.
- Update tape and fuses yearly.
- Keep in door pocket.
- Replace yearly.
- Air out every 6 months.
- Refill monthly in dusty regions.