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Optima D31T

The Optima D31T is a battery pack with a nominal voltage of 12V and AGM cells.

Last updated: 20 October 2026

Battery and charging

Voltage
12V

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Chemistry
AGM

“powerhouse AGM technologies”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Cranking current
900

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Capacity, at the 20-hour rate
75

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Reserve capacity
155

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Size and fit

Overall dimensions
12 13/16" 6 9/16" 9 3/8"

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Terminals
3/8" Stainless Stud

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Stated weight
59.8

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Group the maker sells it as
31T

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Identity

Model code
D31T

“D31T 12V 900 1125 155 75 .0025 12 13/16" 6 9/16" 9 3/8" 59.8 3/8" Stainless Stud 31T”

Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

Sources

  • Archived document

    Source: cdnrg.com/s4x-files/resources/optima-brochure.pdf

    Retrieved October 14, 2026