What is a Group 8D Battery: Technical Information and Comparison with Alternatives

Group 8D Battery Dimensions

Battery Design

Dimensions and Sizes (Length x Width x Height)
20.75'' x 11.125'' x 9.8125'' Inches 527 x 283 x 250 Millimeters

Group 8D Battery Post Terminals

Post Terminal Types and Locations	Posts Used
	Type "A", "A2", "B", "B1" or manufacturer's custom post design

Group 8D Battery Voltage and Current Characteristics

Volts	Cells	CCA Range
12	6	650-1500

Best Group 8D Batteries

List of recommended batteries

Good Choice	Renogy Deep Cycle Agm Battery 200AH for RV, Solar, Marine, and Off-Grid Applications Amp-Hours (AH): 200 Battery Group: 8D Type: AGM Warranty: 24 months Check Price	Check Price
Good Choice	Universal Power Group UPG UB-8D AGM Battery - Sealed Lead Acid - 250 Ah - L4 Terminal Amp-Hours (AH): 250 Battery Group: 8D Type: AGM Warranty: 12 months Check Price	Check Price
Good Choice	CHINS LiFePO4 Battery 12V 200AH - Built-in BMS, 2000-4000 Cycles, for Home Energy Storage, Off-Grid Amp-Hours (AH): 200 Battery Group: 8D Type: LiFePO4 Warranty: 60 months Check Price	Check Price
Good Choice	VMAX XTR8D-310 8D 12V 310Ah Deep Cycle AGM SLA 8D Battery for Solar Panels, Wind Turbines, Inverters and Smart Chargers Amp-Hours (AH): 310 Battery Group: 8D Type: SLA Warranty: 12 months Check Price	Check Price
Good Choice	Trojan 8D-AGM 12V 230Ah Group 8D Deep Cycle AGM Battery FAST USA SHIP Amp-Hours (AH): 230 Battery Group: 8D Type: AGM Warranty: 12 months Check Price	Check Price

Group 8D Alternatives and Closest Battery Groups by Dimensions

There are no direct interchangeable alternatives for group 8D battery if we speak about dimensions, but if your battery space hasn't strict limits, you can choose a little bigger or smaller battery group. If your battery compartment cannot accommodate a larger battery, you can choose a smaller one. In both cases, you must securely fasten your new battery with a battery holder. If your battery holder can't hold the alternative battery group, you can buy a universal battery holder to fit in different types of batteries.

Closest but not Identical Size Battery Groups

Battery groups in this section below are not identical to the group 8D 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 8D group.

Battery Group Number	Dimensions	Shape	Volts	Cells	Post Terminal Type
Group 8D Battery	20.75'' x 11.125'' x 9.8125'' in. 527 x 283 x 250 mm		12	6	"A", "A2", "B", "B1"
Group 6D Battery	20.75'' x 10'' x 10.25'' in. 527 x 254 x 260 mm		12	6	"A", "L"
Group 4D Battery	20.75'' x 8.75'' x 9.8125'' in. 527 x 222 x 250 mm		12	6	"A", "B", "A2"
Group 4DLT Battery	20'' x 8.1875'' x 7.9375'' in. 508 x 208 x 202 mm		12	6	"A"
Group 3ET Battery	19.3125'' x 4.375'' x 9.8125'' in. 491 x 111 x 249 mm		12	6	"A"
Group 3EE Battery	19.3125'' x 4.375'' x 8.875'' in. 491 x 111 x 225 mm		12	6	"A"

How to Get 24 Volts from 12V of a 8D Battery Group

If you need 24 Volts, you can connect two group 8D 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 8D Batteries with a Parallel Connection

If you need to increase current capacity and reduce charging time, connect batteries in parallel. When group 8D 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.