What is a Group 85 Battery: Technical Information and Comparison with Alternatives

Group 85 Battery Dimensions

Battery Design

Dimensions and Sizes (Length x Width x Height)
9.0625'' x 6.8125'' x 8'' Inches 230 x 173 x 203 Millimeters

Group 85 Battery Post Terminals

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

Group 85 Battery Voltage and Current Characteristics

Volts	Cells	CCA Range
12	6	430-630

Group 85 Alternatives and Closest Battery Groups by Dimensions

Interchangeable Battery Groups for 85 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 85 Battery	9.0625'' x 6.8125'' x 8'' in. 230 x 173 x 203 mm		12	6	"A"
Group 86 Battery	9.0625'' x 6.8125'' x 8'' in. 230 x 173 x 203 mm		12	6	"A"

Closest but not Identical Size Battery Groups

Battery groups in this section below are not identical to the group 85 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 85 group.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 85 Battery	9.0625'' x 6.8125'' x 8'' in. 230 x 173 x 203 mm		12	6	"A"
Group 62 Battery	8.875'' x 6.375'' x 8.875'' in. 225 x 162 x 225 mm		12	6	"A"
Group 55 Battery	8.5625'' x 6.0625'' x 8.375'' in. 218 x 154 x 212 mm		12	6	"A"
Group 21R Battery	8.1875'' x 6.8125'' x 8.75'' in. 208 x 173 x 222 mm Positive post on the Right		12	6	"A", "A2"
Group 21 Battery	8.1875'' x 6.8125'' x 8.75'' in. 208 x 173 x 222 mm		12	6	"A", "A2"
Group 26R Battery	8.1875'' x 6.8125'' x 7.75'' in. 208 x 173 x 197 mm Positive post on the Right		12	6	"A"
Group 26 Battery	8.1875'' x 6.8125'' x 7.75'' in. 208 x 173 x 197 mm		12	6	"A", "A2"

Closest Large Dimensions

Bigger batteries can have more capacity and power compared to 85 batteries.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 85 Battery	9.0625'' x 6.8125'' x 8'' in. 230 x 173 x 203 mm		12	6	"A"
Group 25 Battery	9.0625'' x 6.9375'' x 8.875'' in. 230 x 175 x 225 mm		12	6	"A", "A2"
Group 35 Battery	9.0625'' x 6.9375'' x 8.875'' in. 230 x 175 x 225 mm		12	6	"A", "A2"
Group 75 Battery	9.0625'' x 7.0625'' x 7.3125'' in. 230 x 180 x 186 mm		12	6	"S"
Group 72 Battery	9.0625'' x 7.0625'' x 8.25'' in. 230 x 179 x 210 mm		12	6	"S"
Group 73 Battery	9.0625'' x 7.0625'' x 8.5'' in. 230 x 179 x 216 mm		12	6	"S"
Group 67R Battery	9.125'' x 6.9375'' x 6.9375'' in. 231 x 175 x 176 mm Positive post on the Right		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"
Group 90 Battery	9.5625'' x 6.9375'' x 6.9375'' in. 242 x 175 x 175 mm		12	6	"A1", "A2"
Group 47 Battery	9.5625'' x 6.9375'' x 7.5'' in. 242 x 175 x 190 mm		12	6	"A", "A1", "F"
Group 97R Battery	9.9375'' x 6.9375'' x 7.5'' in. 252 x 175 x 190 mm Positive post on the Right		12	6	"A1", "A2"
Group 58 Battery	10.0625'' x 7.1875'' x 6.9375'' in. 255 x 183 x 177 mm		12	6	"A"
Group 58R Battery	10.0625'' x 7.1875'' x 6.9375'' in. 255 x 183 x 177 mm Positive post on the Right		12	6	"A"
Group 59 Battery	10.0625'' x 7.6875'' x 7.75'' in. 255 x 193 x 196 mm		12	6	"A"
Group 34 Battery	10.25'' x 6.8125'' x 7.875'' in. 260 x 173 x 200 mm		12	6	"A"
Group 34R Battery	10.25'' x 6.8125'' x 7.875'' in. 260 x 173 x 200 mm Positive post on the Right		12	6	"A"
Group 24 Battery	10.25'' x 6.8125'' x 8.875'' in. 260 x 173 x 225 mm		12	6	"A", "A2"
Group 24R Battery	10.25'' x 6.8125'' x 9'' in. 260 x 173 x 229 mm Positive post on the Right		12	6	"A", "A2"
Group 24H Battery	10.25'' x 6.8125'' x 9.375'' in. 260 x 173 x 238 mm		12	6	"A"
Group 28 Battery	10.25'' x 6.8125'' x 9.4375'' in. 261 x 173 x 240 mm		12	6	"T"
Group 24T Battery	10.25'' x 6.8125'' x 9.75'' in. 260 x 173 x 248 mm		12	6	"A"
Group 101 Battery	10.25'' x 7.0625'' x 6.6875'' in. 260 x 179 x 170 mm		12	6	"S"
Group 78 Battery	10.25'' x 7.0625'' x 7.3125'' in. 260 x 180 x 186 mm		12	6	"S"
Group 100 Battery	10.25'' x 7.0625'' x 7.375'' in. 260 x 179 x 188 mm		12	6	"S"
Group 74 Battery	10.25'' x 7.25'' x 8.75'' in. 260 x 184 x 222 mm		12	6	"S"
Group 124R Battery	10.375'' x 7'' x 8.625'' in. 262 x 177 x 218 mm Positive post on the Right		12	6	"A"
Group 36R Battery	10.375'' x 7.1875'' x 8.125'' in. 263 x 183 x 206 mm Positive post on the Right		12	6	"A"

How to Get 24 Volts from 12V of a 85 Battery Group

If you need 24 Volts, you can connect two group 85 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 85 Batteries with a Parallel Connection

If you need to increase current capacity and reduce charging time, connect batteries in parallel. When group 85 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.