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Your Trusted Source for Outrageously Dependable® Power
Dependability matters. That’s why drivers trust Interstate Batteries® for a reliable start every time. With easy battery maintenance tips, quick battery checks and fresh batteries when you need them, we’ve got you covered so you can stay confident on the road, powered by the most Outrageously Dependable® name around.
Why, When and Where to Test a Battery
Regular battery tests are quick, easy and often free, making them your best way to catch issues early. Test in spring and fall when temperature swings add stress. A pro can check your battery’s condition, so you are never caught off guard.
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Signs Your Battery Is Failing
- Slow engine crank
- Battery or check engine light*
- Low fluid
- Swollen case
- Corroded terminals
- Dim lights
*May also indicate another mechanical issue.
Does Driving Charge a Battery?
Yes, but mostly at long, highway-speed drives. The alternator powers the car first and charges the battery second, so it won’t fully recharge if:
- A light was left on
- The car sat unused for a month
- You only drive short or stop-and-go trips
The best way to charge your battery is with a charger.
Preventing Battery Drain in an Unused Car
A sitting car can drain the battery in about two months, faster if the battery is older. To help it last:
- Disconnect the security system
- Use a trickle charger
- Take a 30-minute drive every few days
Overheated Batteries
A battery that gets too hot can leak, swell or even explode. Warning signs include:
- Rotten-egg smell
- Swelling
- Steam
If you notice these, turn off the engine and let the car cool.
Cooling a Hot Battery
- Park in shade or a garage
- Open the hood to release heat