Batteries, Chargers, and More

Knowledge Base : Tools : List of Common Battery Case Sizes by BCI Group Number

List of Common Battery Case Sizes by BCI Group Number

Are you looking for a marine, RV, automotive, or solar PV battery? You may have heard common terms like a "group 24 battery" or "type 27 marine battery". These numbers are referring to the BCI Group Number of the battery. These numbers define the physical dimensions of the battery case. This is important as some applications call for specific case sizes. The BCI does not determine the Amp Hours (AH) rating for the batteries, however, but there is a correlation between case size and AH rating. For deep cycle batteries, the larger the case size the more capacity the battery will usually have. For more information about Amp Hours and how it relates to battery capacity, read here. To calculate how much reserve power you need, and thus which battery to use, check out our calculator.

12 Volt Deep Cycle RV & Marine Batteries by BCI Group Number

BCI GROUP NUMBER DIMENSIONS IN INCHES* Amp Hours (AH) THUMBNAIL
Length Width Height

U1

LifeLine Battery #: GPL-U1T (AGM)
Universal Battery #: UB12350-D5722 (AGM)
MK Battery #: 8GU1 (GEL)
Universal Battery #: U1Gel-D5870 (GEL)

7.71" 5.18" 6.89" 32 U1

22NF

Universal Battery #: UB12550-45825 (AGM)
MK Battery #: 8A22NF (AGM)
MK Battery #: 8G22NF (GEL)
Univesal Battery #: UB22NFGEL (GEL)

9.01" 5.43" 9.00" 55 22NF

24

Lifeline Battery #: GPL-24T (AGM)
Universal Battery #: UB12750-45821 (AGM)
Trojan Battery #:T24-GEL (GEL)
Universal Battery #:UB24GEL-D5872 (GEL)

11.13"
6.60" 9.25" 80
24

27

Universal Battery #: UB12900-45826 (AGM)
Lifeline Battery #: GPL-27T (AGM)
Universal Battery #: UB27GEL-D5873 (GEL)
Trojan Batter #: T27-GEL (GEL)

12.00" 6.63"
9.06" 90 27

30H

BatteryStuff Part #: UB121100-40603

13" 6.8"
9.5"
110
31

31

Lifeline Battery #: GPL-31XT (AGM)
Lifeline Battery#: GPL-31T (AGM)
MK Battery #: S31SLDG (GEL)

12.9" 6.75"
9.27"
125
31

4D

Universal Battery #: UB4DAGM-45965 (AGM)
LifeLine Battery #: GPL-4DL (AGM)
Universal Battery #: UPG4DGEL-40701 (GEL)
MK Battery #: 8G4D (GEL)

20.5" 8.13"
10"
200
4D

8D

Lifeline Battery #: GPL-8DL (AGM)
Universal Battery #: UB8DAGM-45964 (AGM)
Universal Battery #: UPG8DGEL-40702 (GEL)
MK Battery #: 8G8D (GEL)

20.75" 11"
11"
245
8D

6 Volt Deep Cycle Batteries by BCI Group Number

BCI GROUP NUMBER DIMENSIONS IN INCHES* Amp Hours (AH) THUMBNAIL
Length Width Height

GC2

Trojan Battery #: T-105 (WET)
Universal Battery #: UBGC2 (AGM)
Lifeline Battery #: GPL-4CT (AGM)
MK Battery #: 8GGC2 (GEL)

10.38" 7.13"
10.88"
225
GC2

L16

Lifeline Battery #: GPL-L16T (AGM)
Trojan Battery #: L16RE-B (WET)
Trojan Battery #: L16RE-A (WET)

11.64" 6.95"
15.73"
400
8D

12 Volt Starting Batteries by BCI Group Number

BCI GROUP NUMBER DIMENSIONS IN INCHES* Amp Hours (AH) CCA THUMBNAIL
Length Width Height

25

BatteryStuff Part #: OPT-25

9.94"
6.81" 7.63" 44
720 25

34

BatteryStuff Part #: OPT-34

10" 6.88"
7.63"
50
800 34

34M

BatteryStuff Part #: OPT-34M

10" 6.88"
7.94"
50
800 34M

34R

BatteryStuff Part #: OPT-34R

10" 6.88"
7.63"
50
800 34R

34/78

BatteryStuff Part #: OPT-34/78

10" 6.88"
7.63"
50
800 34/78

35

BatteryStuff Part #: OPT-35

9.31" 6.82"
7.82"
44
720 35

75/25

BatteryStuff Part #: OPT-75/25

9.31" 6.82"
7.82"
44
720 75/25

 

* Dimensions are generally taken at the widest point on the battery. The length and width are usually longest at the top of the battery, narrowing slightly at the base. The total height includes the terminal posts.


 
0 Responses

Subscribe to comments with RSS.

    Leave a Comment

       (will not be published)

       1   2   3   4   5  

    CAPTCHA Image
    Please enter the security code:    [ Different Image ]

    Shop for...