What is a Group U1R Battery: Technical Information and Comparison with Alternatives

Group U1R Battery Dimensions

Battery of this group has the positive post terminal located on the right. It is marked with the letter "R" because this post terminal position is called Reverse Polarity of Battery. Most batteries have it on the left side. If you want the positive post terminal to be on the left, you can turn around the U1R battery and use it as a group U1 battery, because they have identical dimensions. This will allow you to use the positive post on the left. Make sure you have enough cable length to reach the terminals, because in the turned position the terminals can be located a little further.

Battery Design

Dimensions and Sizes (Length x Width x Height)
7.75'' x 5.1875'' x 7.3125'' Inches 197 x 132 x 186 Millimeters

Group U1R Battery Post Terminals

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

Group U1R Battery Voltage and Current Characteristics

Volts	Cells	CCA Range
12	6	165-365

Equivalents with the Opposite Polarity

Batteries in this section have identical sizes and a positive post terminal on the opposite LEFT side.

Good Choice	EverStart Lead Acid Lawn & Garden 230 CCA Battery, Group Size U1 Cold Cranking Amps (CCA): 230, Battery Group: U1 Type: SLA Warranty: 3 months Check Price	Check Price
Good Choice	EverStart Lawn and Garden 340 CCA Lead Acid Battery, Group Size U1 Cold Cranking Amps (CCA): 340, Battery Group: U1 Type: SLA Warranty: 3 months Check Price	Check Price
Good Choice	Chrome Battery 12V 35Ah Group U1 Deep Cycle Sealed Battery Amp-Hours (AH): 35 Battery Group: U1 Type: SLA Warranty: 18 months Check Price	Check Price
Good Choice	Mighty Max ML-U1 12V 200CCA Battery for Craftsman 25780 Lawn Tractor and Mower Cold Cranking Amps (CCA): 200, Battery Group: U1 Type: SLA Warranty: 12 months Check Price	Check Price
Good Choice	12V 35AH Group U1 Deep Cycle Sealed Battery Amp-Hours (AH): 35 Battery Group: U1 Type: SLA Warranty: 12 months Check Price	Check Price

Group U1R Alternatives and Closest Battery Groups by Dimensions

Interchangeable Battery Groups for U1R 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 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"

Closest but not Identical Size Battery Groups

Battery groups in this section below are not identical to the group U1R 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 U1R group.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
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 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"
Group 400 Battery	5.875'' x 3.4375'' x 5.625'' in. 150 x 88 x 143 mm		12	6	"AuxTerminal"
Group 401 Battery	5.875'' x 3.4375'' x 5.125'' in. 150 x 88 x 130 mm		12	6	"AuxTerminal"

Closest Large Dimensions

Bigger batteries can have more capacity and power compared to U1R batteries.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
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 57 Battery	8.0625'' x 7.1875'' x 6.9375'' in. 205 x 183 x 177 mm		12	6	"A"
Group 102R Battery	8.125'' x 6.9375'' x 5.5'' in. 207 x 175 x 139 mm Positive post on the Right		12	6	"A"
Group 99 Battery	8.125'' x 6.9375'' x 6.9375'' in. 207 x 175 x 175 mm		12	6	"A1"
Group 99R Battery	8.125'' x 6.9375'' x 6.9375'' in. 207 x 175 x 175 mm Positive post on the Right		12	6	"A1"

How to Get 24 Volts from 12V of a U1R Battery Group

If you need 24 Volts, you can connect two group U1R 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 U1R Batteries with a Parallel Connection

If you need to increase current capacity and reduce charging time, connect batteries in parallel. When group U1R 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.