Battery Equivalents and Replacements

Group 24 Batteries - Dimensions, Features, and Recommendations

mighty max ml75 12 mBCI Group 24 batteries are mostly general-purpose batteries commonly found in large UPS systems, medical and security systems, wheelchairs, in vehicles, industrial applications, etc. They are rarely used as starting/cranking batteries - more commonly they are used in deep cycle standby/float applications.

These mid-size batteries feature several subgroups, differing slightly in their dimensions - one must be careful which battery is required, since even the slightest size differences may cause the battery not to fit its compartment.

Updated: April 29, 2021.

Most common BCI Group 24 battery chemistry is AGM (Absorbent Glass Mat) SLA (Sealed Lead Acid) battery, but there are other chemistries/type present as well, like gel-cell batteries, flooded battery and even lithium-ion batteries.

BCI Group 24 batteries feature dimensions of (L x W x H) 10.25 x 6.8125 x 8.875 inches (260 x 173 x 225 mm), but there are other subgroups present as well:

BCI Group Size L x W x H (mm) L x W x H (inches) Amazon Search
24 260 x 173 x 225 10 1/4 x 6 13/16 x 8 7/8 Group 24 Battery
24F 273 x 173 x 229 10 3/4 x 6 13/16 x 9 Group 24F Battery
24H 260 x 173 x 238 10 1/4 x 6 13/16 x 9 3/8 Group 24H Battery
24R 260 x 173 x 229 10 1/4 x 6 13/16 x 9 Group 24R Battery
24T 260 x 173 x 248 10 1/4 x 6 13/16 x 9 3/4 Group 24T Battery

Note: Amazon affiliate links in the chart open in the new windows, feel free to check them.

Although these batteries are rather similar, note that BCI Group 24F is slightly longer and wider than other groups.

Despite height differences, in most cases, battery compartments have at least some spare height and if they are able to accommodate Group 24 battery (8 7/8 inch height), in most cases they are able to accommodate even the batteries from Group 24T (9 3/4 inch height) which is 7/8 inch (0.875 inch, ~22 mm) taller than 'standard' Group 24 battery.

 Group 24 Batteries vs. Other Popular Battery Groups

Most common battery groups and their dimensions in inches and centimeters are given in the following chart:

Group Size LxWxH (inches) LxWxH (cm)
Group 24 Batteries 10.25 x 6.8125 x 8.875 26 x 17.3 x 22.5
Group 27 Batteries 12.0625 x 6.8125 x 8.875 30.6 x 17.3 x 22.5
Group 31 Batteries 13 x 6.8125 x 9.4375 33 x 17.3 x 24
Group 34 Batteries 10.25 x 6.8125 x 7.875 26 x 17.3 x 20
Group 35 Batteries 9.0625 x 6.875 x 8.875 23 x 17.5 x 22.5
Group 51 and 51R Batteries 9.374 x 5.0625 x 8.8125 23.8 x 12.9 x 22.3
Group 65 Batteries 12.0625 x 7.5 x 7.5625 30.6 x 19 x 19.2
Group 78 Batteries 10.25 x 7.0625 x 7.6875 26 x 17.9 x 19.6

Battery compartments that accept group 24 batteries, may also accept group 34 batteries (same length and width, just one inch lower height). Group 25/35 batteries feature the same height (8.875 inches, 22.5 cm), they are somewhat shorter (~1.2 inches, 3 cm), but are also slightly wider (0.0625 inches, 0.16 cm) - this width difference is so small that practically can be ignored.

Note: Group 25 and group 35 batteries features same physical dimensions and are used almost interchangeable. But, when getting group 25/35 batteries, be sure to check actual dimensions, terminal type, terminal orientation and similar. But, that is whole another story ...

Group 24 Batteries Comparison Chart

The following chart lists some of the most popular BCI Group 24 batteries:

Model

Battery Type

Chemistry

Capacity(Ah)

RC (min)

CCA

MCA

Weight (lbs/kg)

Review

ACDelco M24AGM

Deep Cycle

AGM

80

140

500

625

43.0 lbs; ~19.5 kg

-

Exide Edge FP-AGM24DP

Dual Purpose

AGM

75

145

775

930

50 lbs; ~22.7 kg

Review

Lifeline GPL-24T

Deep Cycle

AGM

80

149

550

680

56 lbs; 25.5 kg

-

Mighty Max ML75-12

Deep Cycle

AGM

77

-

-

-

50.71 lbs;  ~22.97 kg

Review

NorthStar NSB-AGM24F

Dual Purpose

AGM

76

160

840

1000

57 lbs;  ~25.8 kg

-

UPG UB12750

Deep Cycle 

AGM

75

-

-

-

49.1 lbs;  ~22.3 kg

Review

VMAXTANKS MB107-85

Deep Cycle 

AGM

85

170

-

-

55 lbs; ~24.9 kg

Review

VMAXTANKS MR107-85

Deep Cycle 

AGM

85

160

-

700

55 lbs; ~24.9 kg 

Review

VMAXTANKS SLR-85

Deep Cycle 

AGM

85

180

-

-

55 lbs; ~24.9 kg 

Review

Weize FP12750/TL1275

Deep Cycle

AGM

77

-

-

-

46 lbs; 20.9 kg

Review

Note: Amazon affiliate links ('Model' column) open in the new windows, feel free to check them for the most up-to-date prices and offers.

Again, since group 24 battery compartments may accept group 34 batteries, the following chart lists the most popular BCI group 34 batteries and their most important features:

Model

Battery Type

Chemistry

Ah

RC

CCA

MCA

Weight (lbs/kg)

Review

ACDelco 34AGM

Starting

AGM

60

115

740

-

38.7 lbs; 17.4 kg

-

Banshee 34M

Dual Purpose

Flooded

66

100

750

870

37.0 lbs; 16.8 kg

-

Banshee LFP-34M

Dual Purpose

LiFePO4

50

~120

800

-

13.8 lbs; 6.25 kg

-

Deka 9A34

Dual Purpose

AGM

55

120

750

955

41 lbs; 18.6 kg

-

Delphi BU9034

Starting

AGM

55

120

775

-

42.5 lbs; 19.3 kg

-

DieHard 38232

Starting

AGM

55

120

775

-

44.5 lbs; 20.2 kg

Review

Exide Edge FP-AGM34

Dual Purpose

AGM

60

120

770

-

45.9 lbs; 20.8 kg

-

NorthStar NSB-AGM34

Dual Purpose

AGM

65

134

880

1050

51 lbs; 23.1 kg

-

NorthStar NSB-AGM34/78

Dual Purpose

AGM

65

134

880

1050

51 lbs; 23.1 kg

-

Odyssey 34-PC1500T

Dual Purpose

AGM

68

135

850

1050

49.5 lbs; 22.4 kg

Review

Optima RedTop 34

Starting

AGM

50

100

800

1000

37.9 lbs; 17.2 kg

Review

Optima 8016-103 D34M

Dual Purpose

AGM

55

120

750

870

43.5 lbs; 19.7 kg

Review

VMAXTANKS XTR34-75

Deep Cycle

AGM

75

145

-

825*

45.0 lbs; 20.4 kg

Review

XS Power D3400 12V 65 Ah

Dual Purpose

AGM

65

135

-

1000

47.0 lbs; 21.32 kg

Review

XS Power D3400 12V 80Ah

Dual Purpose

AGM

80

160

-

1150

50 lbs; 22.67 kg

Review

Note: Amazon affiliate links ('Model' column) open in the new windows, feel free to check them for the most up-to-date prices and offers.

group24batteries mDue to the slightly smaller dimensions, group 34 batteries feature smaller 20h capacity (50-75 vs 75-85 Ah), shorter Reserve Capacity (100-145 vs 140-180 minutes) and are generally lighter (37 - 51 vs 43 - 57 pounds).

Since group 24 batteries are mostly deep cycle batteries and group 34 batteries may be found as deep cycle, dual purpose and as starting batteries, people that need starting group 24 batteries should consider either dual-purpose NorthStar NSB-AGM24 battery (1000 MCA) or dual purpose/starting group 34 batteries - NorthStar NSB-AGM34 (1050 MCA), Odyssey 34M-PC1500 (1050 MCA), or Optima RedTop 34 (1000 MCA).

Group 24 Batteries as Wheelchair Batteries

Due to their dimensions, group 24 batteries are mostly used in single battery, 12 volts wheelchair electric system.

Endurance of such wheelchairs depend on their motors, controllers, terrain and driving needs. For example, wheelchairs with 2x150 watt motors, may expect operating time roughly similar to the Reserve Capacity value of these batteries.

One of the best deep cycle performers in this group is VMAXTANKS SLR-85, featuring RC value of 180 minutes - that is 3 hours of non-stop driving at full power.

However, wheelchairs designed for outdoor use commonly have 2x250 or 2x300 watts motors, requiring 40-50 Amps of current.

Group 24 batteries are able to provide such currents, but as the current is increased, effective capacity is decreased, for example:

- Mighty Max ML75-12: 48.5 Amps for 1h, down to 9.6 volts (48.5 Ah),

- UPG UB12750: 42.0 Amps for 1h, down to 9.6 volts (42.0 Ah).

Other group 24 batteries perform better when being drained at this rate, but exact data are rather hard to find.

Price of group 24 batteries varies depending on capacity, warranty, discharge characteristics and similar.

When looking for the right group 24 battery for your application, choose according to your personal needs, but also brand preferences.


slr 85Long Story Short: BCI group 24 batteries are primarily intended for deep cycle or dual purpose applications. Regardless if they are intended for automotive, marine or industrial applications, these batteries can store plenty of energy and provide plenty of power, especially when being used in low power applications.

These batteries differ in terms of chemistry, battery type, terminals, weight, starting and deep discharge performances and in the end, price.

Model

Battery Type

Chemistry

Capacity(Ah)

RC (min)

CCA

MCA

Weight (lbs/kg)

Review

ACDelco M24AGM

Deep Cycle

AGM

80

140

500

625

43.0 lbs; ~19.5 kg

-

Exide Edge FP-AGM24DP

Dual Purpose

AGM

75

145

775

930

50 lbs; ~22.7 kg

Review

Lifeline GPL-24T

Deep Cycle

AGM

80

149

550

680

56 lbs; 25.5 kg

-

Mighty Max ML75-12

Deep Cycle

AGM

77

-

-

-

50.71 lbs;  ~22.97 kg

Review

NorthStar NSB-AGM24F

Dual Purpose

AGM

76

160

840

1000

57 lbs;  ~25.8 kg

-

UPG UB12750

Deep Cycle 

AGM

75

-

-

-

49.1 lbs;  ~22.3 kg

Review

VMAXTANKS MB107-85

Deep Cycle 

AGM

85

170

-

-

55 lbs; ~24.9 kg

Review

VMAXTANKS MR107-85

Deep Cycle 

AGM

85

160

-

700

55 lbs; ~24.9 kg 

Review

VMAXTANKS SLR-85

Deep Cycle 

AGM

85

180

-

-

55 lbs; ~24.9 kg 

Review

Weize FP12750/TL1275

Deep Cycle

AGM

77

-

-

-

46 lbs; 20.9 kg

Review

Note: Amazon affiliate links ('Model' column) open in the new windows, feel free to check them for the most up-to-date prices and offers.

Since these batteries are not the cheapest on the market, before ordering new group 24 battery, be sure to check specifications of your old battery (especially battery and battery compartment actual size) and compare it with the batteries in the chart.

Note: whatever you do, stay safe. Even deep cycle batteries can provide a serious energy burst and cause damage, injuries or worse.

Amazon Search:

- Group 24 Battery

- Group 34 Battery

- 10 Amps AGM Battery Charger

Note: Amazon links open in the new windows, feel free to check them for the most up-to-date offers and prices.