What is a Group 45 Battery: Technical Information and Comparison with Alternatives

Group 45 Battery Dimensions

Battery Design

Dimensions and Sizes (Length x Width x Height)
9.4375'' x 5.5'' x 8.9375'' Inches 240 x 140 x 227 Millimeters

Group 45 Battery Post Terminals

Post Terminal Types and Locations	Posts Used
	Type "A", "A2" or manufacturer's custom post design

Group 45 Battery Voltage and Current Characteristics

Volts	Cells	CCA Range
12	6	235-500

Best Group 45 Batteries

List of recommended batteries

Good Choice

SLI45 Duracell Ultra Flooded 485CCA BCI Group 45 Heavy Duty Battery Cold Cranking Amps (CCA): 485, Battery Group: 45 Type: Lead-Acid Warranty: 24 months Check Price

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Group 45 Alternatives and Closest Battery Groups by Dimensions

Interchangeable Battery Groups for 45 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 45 Battery	9.4375'' x 5.5'' x 8.9375'' in. 240 x 140 x 227 mm		12	6	"A", "A2"
Group 22NF Battery	9.4375'' x 5.5'' x 8.9375'' in. 240 x 140 x 227 mm		12	6	"A", "A2"

Closest but not Identical Size Battery Groups

Battery groups in this section below are not identical to the group 45 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 45 group.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 45 Battery	9.4375'' x 5.5'' x 8.9375'' in. 240 x 140 x 227 mm		12	6	"A", "A2"
Group 51R Battery	9.375'' x 5.0625'' x 8.75'' in. 238 x 129 x 223 mm Positive post on the Right		12	6	"A", "A2"
Group 51 Battery	9.375'' x 5.0625'' x 8.75'' in. 238 x 129 x 223 mm		12	6	"A", "A2"
Group U1R Battery	7.75'' x 5.1875'' x 7.3125'' in. 197 x 132 x 186 mm Positive post on the Right		12	6	"X"
Group U1 Battery	7.75'' x 5.1875'' x 7.3125'' in. 197 x 132 x 186 mm		12	6	"X"
Group 151R Battery	7.4375'' x 4.9375'' x 8.875'' in. 188 x 125 x 225 mm Positive post on the Right		12	6	"A"
Group U2 Battery	6.3125'' x 5.1875'' x 7.125'' in. 160 x 132 x 181 mm		12	6	"A3", "X"

Closest Large Dimensions

Bigger batteries can have more capacity and power compared to 45 batteries.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 45 Battery	9.4375'' x 5.5'' x 8.9375'' in. 240 x 140 x 227 mm		12	6	"A", "A2"
Group 56 Battery	10'' x 6.0625'' x 8.375'' in. 254 x 154 x 212 mm		12	6	"A"
Group 96R Battery	9.5'' x 6.9375'' x 6.9375'' in. 242 x 175 x 175 mm Positive post on the Right		12	6	"A", "A1"
Group 22F Battery	9.5'' x 6.9375'' x 8.3125'' in. 241 x 175 x 211 mm		12	6	"A"
Group 22HF Battery	9.5'' x 6.9375'' x 9'' in. 241 x 175 x 229 mm		12	6	"A"
Group 42 Battery	9.5625'' x 6.9375'' x 6.9375'' in. 242 x 175 x 175 mm		12	6	"A", "A1"

How to Get 24 Volts from 12V of a 45 Battery Group

If you need 24 Volts, you can connect two group 45 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 45 Batteries with a Parallel Connection

If you need to increase current capacity and reduce charging time, connect batteries in parallel. When group 45 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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