What is a Group 31T Battery: Technical Information and Comparison with Alternatives

Group 31T Battery Dimensions

Battery Design

Dimensions and Sizes (Length x Width x Height)
13'' x 6.8125'' x 9.4375'' Inches 330 x 173 x 240 Millimeters

Group 31T Battery Post Terminals

Post Terminal Types and Locations	Posts Used
	Type "T", "M", "M1" or manufacturer's custom post design

Group 31T Battery Voltage and Current Characteristics

Volts	Cells	CCA Range
12	6	300-1300

Group 31T Alternatives and Closest Battery Groups by Dimensions

Interchangeable Battery Groups for 31T Battery

These groups have the same dimensions and performance but can have different terminal post types, post locations, and polarity.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 31T Battery	13'' x 6.8125'' x 9.4375'' in. 330 x 173 x 240 mm		12	6	"T", "M", "M1"
Group 31A Battery	13'' x 6.8125'' x 9.4375'' in. 330 x 173 x 240 mm		12	6	"A", "M", "M1"

Closest but not Identical Size Battery Groups

Battery groups in this section below are not identical to the group 31T battery, they can be a little bigger or smaller. Please pay attention to the post terminal types and their location

Closest Groups that Have Slightly Smaller Dimensions

Smaller batteries can have less capacity, performance, and power in comparison with 31T group.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 31T Battery	13'' x 6.8125'' x 9.4375'' in. 330 x 173 x 240 mm		12	6	"T", "M", "M1"
Group 27F Battery	12.5'' x 6.8125'' x 8.9375'' in. 318 x 173 x 227 mm		12	6	"A", "A2"
Group 27R Battery	12.0625'' x 6.8125'' x 8.875'' in. 306 x 173 x 225 mm Positive post on the Right		12	6	"A", "A2"
Group 27 Battery	12.0625'' x 6.8125'' x 8.875'' in. 306 x 173 x 225 mm		12	6	"A", "A2"
Group 27H Battery	11.75'' x 6.8125'' x 9.25'' in. 298 x 173 x 235 mm		12	6	"A"
Group 64 Battery	11.625'' x 6.375'' x 8.875'' in. 296 x 162 x 225 mm		12	6	"A"

Closest Large Dimensions

Bigger batteries can have more capacity and power compared to 31T batteries.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 31T Battery	13'' x 6.8125'' x 9.4375'' in. 330 x 173 x 240 mm		12	6	"T", "M", "M1"
Group 43 Battery	13.125'' x 6.9375'' x 8.0625'' in. 334 x 175 x 205 mm		12	6	"A", "A1"
Group 76 Battery	13.125'' x 7.0625'' x 8.5'' in. 334 x 179 x 216 mm		12	6	"S"
Group 33 Battery	13.3125'' x 6.8125'' x 9.375'' in. 338 x 173 x 238 mm		12	6	"A"
Group 30H Battery	13.5'' x 6.8125'' x 9.25'' in. 343 x 173 x 235 mm		12	6	"A"

How to Get 24 Volts from 12V of a 31T Battery Group

If you need 24 Volts, you can connect two group 31T batteries in series to double the voltage. The voltage of a series connection is equal to the sum of the voltages of all its batteries. If one 12V lead-acid battery is connected to another 12V lead-acid battery, you have 24V total power output. Each battery must be fully charged and completely isolated from the other before connecting them in series, or there will be damage to at least one of them.

Increasing a Capacity of 31T Batteries with a Parallel Connection

If you need to increase current capacity and reduce charging time, connect batteries in parallel. When group 31T batteries are in parallel, their voltage is equal to the voltage of one battery, while current capacity equals to the sum of all its battery capacities. If you have two 12V lead-acid batteries with 60 Ah capacity and you connect them in parallel, you'll get 12 Volts with 120 Ah.

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