Quick answer
A typical 12V lead-acid car battery for a passenger car weighs roughly 30 to 60 pounds (about 14 to 27 kg). Small batteries for compact cars sit toward the low end of that range, while large batteries for trucks and SUVs, or some AGM batteries, can be at the higher end or slightly above it. The exact figure is usually in the manufacturer’s specifications for the specific model.
Typical weights
These are broad, approximate ranges and will vary by brand and model:
| Battery | Approximate weight |
|---|---|
| Small passenger car, flooded | Around 25 to 35 lb (11 to 16 kg) |
| Mid-size car or SUV, flooded | Around 35 to 50 lb (16 to 23 kg) |
| Large truck or SUV, flooded | Around 45 to 65 lb (20 to 30 kg) |
| AGM of the same group size | Often similar to or somewhat heavier than flooded |
| Small 12V lithium starter battery | Much lighter, sometimes under 10 lb (about 4.5 kg) |
If you need an exact weight for shipping or lifting, check the specification sheet or the retailer’s listing for the battery’s group size. See car battery ratings and sizes for how group size relates to the case.
Why car batteries are heavy
Most of the weight comes from lead. A lead-acid battery contains lead plates and a lead-based grid, plus liquid or absorbed electrolyte, all inside a plastic case. Larger cases hold more plates, so higher-capacity and higher-CCA batteries tend to weigh more. Lithium batteries use lighter materials, which is why they weigh far less for a similar starting role. For how the types differ in construction, see car battery types compared.
Is a charged battery heavier than a dead one?
Not in any way you would notice. Charging and discharging change the chemistry inside the battery, but the total mass stays essentially the same, because nothing leaves the sealed case. A charged battery is not meaningfully heavier than a discharged one.
What about electric car batteries?
An electric vehicle’s main traction battery pack is far heavier than a 12V starter battery, typically hundreds of kilograms and often a large share of the car’s overall weight. Weight varies widely by model and capacity, so check the manufacturer’s figures for a specific vehicle, such as a Tesla. EVs also carry a separate small 12V battery for accessories, which is closer in size and weight to a conventional one. See what a car battery does for how that 12V battery fits in.
Lifting and handling safely
- Lift with your legs and keep the battery upright, since some designs can leak acid if tilted.
- Use a battery carrier strap if the case has handles or lugs.
- Wear gloves and eye protection when handling a battery.
- Turn the ignition off and disconnect the negative cable first when removing it, and reconnect it last when installing.
- Check for cracks or leaks before lifting.
Disposal
Old lead-acid batteries should not go into household trash. Many retailers and recycling centers accept them, and some charge a core deposit that is refunded when you return the old battery.
What shortens a battery’s life?
The PAA question about what “kills” a battery the most has no single answer. Common contributors are extreme heat, repeated deep discharge, long periods of sitting unused, frequent short trips, loose mounting that lets it vibrate, and an overcharging or undercharging alternator. Checking your battery voltage periodically helps catch problems early. See car battery voltage for readings to look for.