Duralast Heavy Duty 31-950
$189.43+ $22.00 core charge, added to your order
Duralast Heavy Duty commercial batteries
Duralast Heavy Duty Group 31P-B
Delivered and installed at your home, work, yard or job site anywhere in Dallas–Fort Worth.
$189.43+ $22.00 core charge, added to your order
The same batteries as the parts store, brought to you. We deliver the battery and install it where you park, so you never have to go get it.
Final battery price, reviewed October 2026. Your order adds the $22.00 core charge and mobile installation for your vehicle. The final price is confirmed before dispatch based on availability. You pay after installation.
- Group size
- 31
- Technology
- Heavy-duty commercial
- Cold cranking amps
- 950 CCA
- Reserve capacity
- 195 minutes
- Listed warranty
- 1 year
- Part number
- 31P-B
- Approx. case size
- 13 × 6.8 × 9.4 in
Which trucks and equipment use group 31P-B
Class 8 trucks, buses, tractors and equipment, usually installed in banks of two to four batteries.
Group size alone does not guarantee a fit. Cranking amps, terminal layout, AGM or flooded construction and any registration needs all matter, so we confirm this battery against your VIN before dispatch.
What your quote includes
- The battery at its final price (reference $189.43).
- A core charge (reference $22.00), added to your order where it applies.
- Mobile delivery and installation labor for your vehicle.
Questions about this battery
How much does mobile battery replacement cost?
Your total has three parts: the battery at its final price, a core charge (usually $22) added to your order, and installation labor for your vehicle. TotalPro batteries start at about $129.89, Duralast standard batteries at about $194.84 and Duralast Platinum AGM batteries at about $281.44. Labor starts at $90 and depends on how hard the battery is to reach, and we bring the battery to you instead of you going to get it. The battery finder shows every line for your vehicle, and we send the confirmed total before we dispatch. See how pricing works.
When do I pay?
After the battery is installed and the vehicle starts. Nothing is charged before the work is done.
Should I replace all the batteries in my truck at once?
Usually, yes. Batteries in a bank share the load, so one new battery wired to old ones gets overworked and wears out early. We test the bank and recommend replacing it as a set when the others are weak.
My machine is 24 volts. What batteries does it need?
A 24-volt system usually uses two 12-volt batteries, such as two 8Ds, two 4Ds or two Group 31s, wired in series. Both should be replaced together with matching batteries. Send us the machine model or a photo of the battery label and we confirm it.
What warranty comes with the battery?
The warranty depends on the exact battery. Duralast standard batteries are currently listed with a 2-year warranty, Duralast Platinum AGM batteries with 4 years and Duralast Heavy Duty commercial batteries with 1 year. We confirm the warranty terms for your specific battery with your quote and give you the paperwork after installation.
Related batteries
Duralast Heavy Duty 31-750
$167.78+ $22.00 core charge, added to your order
Duralast Heavy Duty 4D
$232.73+ $22.00 core charge, added to your order
Duralast Heavy Duty 8D
$310.67+ $60.00 core charge, added to your order
Need a battery today?
Call (682) 688-3514 or book online. We confirm the exact battery and price before a technician heads your way.