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Customer Service
+1 832 808 95 78
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Free standard shipping on orders over $1999
Estimated to be delivered
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
When your livelihood depends on your fleet, downtime isn't an option. The Interstate M-Line 31T Commercial Battery is engineered to deliver reliable, heavy-duty starting power for commercial trucks, agricultural equipment, and large diesel engines. Built to withstand extreme operating conditions, this Group 31 battery combines rugged durability with the trusted, long-lasting performance that commercial operators demand.
With a robust design that resists intense vibration and a 12-month free replacement warranty, it’s the ultimate choice for keeping your big rigs, buses, and heavy machinery moving forward.
Commercial-Grade Power: Specially engineered for high-demand starting environments, offering dependable Cold Cranking Amps (CCA) to power through harsh winter mornings.
Rugged Vibration Resistance: Heavy-duty grid designs and reinforced polypropylene casing protect internal components against the punishing vibrations of long-haul driving and rough terrain.
Maintenance-Free Convenience: Designed to minimize water loss and eliminate the need for regular watering, saving you time and fleet maintenance costs.
Premium Quality Build: Features standard 31T threaded posts for secure, high-conductivity connections and an integrated handle for easier installation.
Guaranteed Peace of Mind: Backed by Interstate’s trusted 12-Month Free Replacement Warranty.
| Attribute | Specification |
| Brand | Interstate Batteries |
| Line / Series | M-Line Commercial |
| Group Size | Group 31 (31T) |
| Terminal Type | Threaded Stud / Post |
| Warranty | 12-Month Free Replacement |
| Application | Semi-Trucks, Commercial Fleets, Buses, Agricultural & Construction Equipment |
Class 7 and 8 over-the-road semi-trucks (Freightliner, Volvo, Kenworth, Peterbilt)
Delivery fleets and vocational trucks
Agricultural tractors and heavy construction machinery
Marine and diesel generator backup systems
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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