Heading away on holiday or leaving your car parked for a while?
The last thing you want is to come home, turn the key… and get nothing.
A flat car battery after sitting unused is incredibly common — but it’s also easy to prevent with a few simple steps.
Why Car Batteries Go Flat When Not in Use
Even when your car isn’t being driven, your battery is still slowly losing charge.
This is due to:
- Natural self-discharge (all batteries lose charge over time)
- Parasitic drain (electronics like alarms, clocks, and computers)
- Temperature extremes (hot or cold speeds up discharge)
If left long enough, even a healthy battery can go flat.
The Biggest Mistake People Make
A common bit of advice is:
“Just get someone to start your car once a week”
In reality, this often causes more problems than it solves:
- The battery may not fully recharge
- It adds unnecessary wear and tear
- There’s risk of accidents or misuse
- It’s inconsistent and unreliable
There’s a better way.
The Best Ways to Prevent a Flat Battery
- Fully Charge Your Battery Before You Go
Make sure your battery is properly charged before leaving.
- Disconnect the Battery (If Practical)
Disconnecting stops any drain from the vehicle.
- Use a Battery Maintenance Charger (Best Option)
A maintenance charger keeps your battery at the right charge level automatically.
This is the most reliable, set-and-forget solution.
Quick Tip Before You Leave
If your battery is already a few years old, there’s a higher chance it may not recover after sitting.
It’s worth checking this before you go:
When to replace your car battery
Need Help or the Right Setup?
At Battery Warehouse we can help you:
- Choose the right battery or charger
- Check your current battery health
- Get sorted before you head away
Browse our range of car batteries get in touch for advice.
Final Thought
A little preparation goes a long way.
Sort your battery before you leave — and you won’t come back to a frustrating (and avoidable) problem.
