BCI Battery Group Size Chart categorizes car batteries by size. Group 27 and Group 31 differ in size and capacity, with Group 31 larger and higher-rated. Group 24 vs. Group 27 favors the latter in capacity and size. Group 51R suits compact cars. Group 35 offers higher capacity for larger vehicles. Various sizes like Group 47, 34, 48, 41, 65, 94R, and 78 cater to different needs.
Understanding Battery Group Size Chart
Battery group sizes correlate with physical dimensions and Amp Hours (AH) ratings. Choosing the right size is crucial to avoid power issues and wiring damage. Consult manuals or online sources for compatibility when replacing batteries to ensure optimal performance and safety.
- Understanding the Chart: The Battery Group Size Chart standardizes batteries based on dimensions, including length, width, height, and polarity. Each number corresponds to different size sets, with larger numbers indicating bigger batteries.
- Choosing the Right Size: Consult your owner’s manual or reliable online sources to identify the correct size for your devices.
- Impact of Incorrect Sizes: Choosing the wrong size can lead to problems. Small batteries may not provide sufficient power, while large ones could damage wiring.
When replacing an old battery with a new one, make sure the new battery is the same type as the old one or it’s confirmed to be a direct replacement. Also, check that the new battery has the same or better electrical capabilities.
BCI Group Numbers, and Dimensional Specifications
BCI Group Numbers categorize batteries by dimensions for proper fitment. Each number corresponds to specific size sets, indicating battery size. Dimensional specifications include length, width, height, and polarity. These standards ensure compatibility in various devices and vehicles, aiding in selecting the right battery.
BCI Group Size | L x W x H (mm) | L x W x H (inches) | Redway Power Lithium Batteries |
21 | 208 x 173 x 222 | 8 3/16 x 6 13/16 x 8 3/4 | |
21R | 208 x 173 x 222 | 8 3/16 x 6 13/16 x 8 3/4 | |
22F | 241 x 175 x 211 | 9 1/2 x 6 7/8 x 8 5/16 | |
22HF | 241 x 175 x 229 | 9 1/2 x 6 7/8 x 9 | |
22NF | 240 x 140 x 227 | 9 7/16 x 5 1/2 x 8 15/16 | |
22R | 229 x 175 x 211 | 9 x 6 7/8 x 8 5/16 | |
24 | 260 x 173 x 225 | 10 1/4 x 6 13/16 x 8 7/8 | 12V75Ah 12V90Ah 12V100Ah 24V50Ah |
24F | 273 x 173 x 229 | 10 3/4 x 6 13/16 x 9 | |
24H | 260 x 173 x 238 | 10 1/4 x 6 13/16 x 9 3/8 | |
24R | 260 x 173 x 229 | 10 1/4 x 6 13/16 x 9 | |
24T | 260 x 173 x 248 | 10 1/4 x 6 13/16 x 9 3/4 | |
25 | 230 x 175 x 225 | 9 1/16 x 6 7/8 x 8 7/8 | |
26 | 208 x 173 x 197 | 8 3/16 x 6 13/16 x 7 3/4 | |
26R | 208 x 173 x 197 | 8 3/16 x 6 13/16 x 7 3/4 | |
27 | 306 x 173 x 225 | 12 1/16 x 6 13/16 x 8 7/8 | 12V90Ah |
27F | 318 x 173 x 227 | 12 1/2 x 6 13/16 x 8 15/16 | |
27H | 298 x 173 x 235 | 11 3/4 x 6 13/16 x 9 1/4 | |
29NF | 330 x 140 x 227 | 13 x 5 1/2 x 8 15/16 | |
31 | 330 x 173 x 240 | 13 x 6 13/16 x 9 7/16 | 12V100Ah 12V120Ah 12V150Ah 24V60Ah |
33 | 338 x 173 x 238 | 13 5/16 x 6 13/16 x 9 3/8 | |
34 | 260 x 173 x 200 | 10 1/4 x 6 13/16 x 7 7/8 | 12V75Ah-ST (Car Starting Battery) |
34R | 260 x 173 x 200 | 10 1/4 x 6 13/16 x 7 7/8 | |
35 | 230 x 175 x 225 | 9 1/16 x 6 7/8 x 8 7/8 | |
36R | 263 x 183 x 206 | 10 3/8 x 7 3/16 x 8 1/8 | |
40R | 278 x 175 x 175 | 11 x 6 15/16 x 6 15/16 | |
41 | 293 x 175 x 175 | 11 9/16 x 6 15/16 x 6 15/16 | |
42 | 242 x 175 x 175 | 9 9/16 x 6 15/16 x 6 15/16 | |
43 | 334 x 175 x 205 | 13 1/8 x 6 7/8 x 8 1/16 | |
45 | 240 x 140 x 227 | 9 7/16 x 5 1/2 x 8 15/16 | |
46 | 273 x 173 x 229 | 10 3/4 x 6 13/16 x 9 | |
47 | 242 x 175 x 190 | 9 9/16 x 6 7/8 x 7 1/2 | |
48 | 278 x 175 x 190 | 11 x 6 7/8 x 7 1/2 | |
49 | 354 x 175 x 190 | 13 15/16 x 6 7/8 x 7 1/2 | |
50 | 343 x 127 x 254 | 13 1/2 x 5 x 10 | |
51 | 238 x 129 x 223 | 9 3/8 x 5 1/16 x 8 3/4 | |
51R | 238 x 129 x 223 | 9 3/8 x 5 1/16 x 8 3/4 | |
52 | 186 x 147 x 210 | 7 5/16 x 5 13/16 x 8 1/4 | |
53 | 330 x 119 x 210 | 13 x 4 11/16 x 8 1/4 | |
54 | 186 x 154 x 212 | 7 5/16 x 6 1/16 x 8 3/8 | |
55 | 218 x 154 x 212 | 8 9/16 x 6 1/16 x 8 3/8 | |
56 | 254 x 154 x 212 | 10 x 6 1/16 x 8 3/8 | |
57 | 205 x 183 x 177 | 8 1/16 x 7 3/16 x 6 15/16 | |
58 | 255 x 183 x 177 | 10 1/16 x 7 3/16 x 6 15/16 | |
58R | 255 x 183 x 177 | 10 1/16 x 7 3/16 x 6 15/16 | |
59 | 255 x 193 x 196 | 10 1/16 x 7 5/8 x 7 3/4 | |
60 | 332 x 160 x 225 | 13 1/16 x 6 5/16 x 8 7/8 | |
61 | 192 x 162 x 225 | 7 9/16 x 6 3/8 x 8 7/8 | |
62 | 225 x 162 x 225 | 8 7/8 x 6 3/8 x 8 7/8 | |
63 | 258 x 162 x 225 | 10 3/16 x 6 3/8 x 8 7/8 | |
64 | 296 x 162 x 225 | 11 5/8 x 6 3/8 x 8 7/8 | |
65 | 306 x 192 x 192 | 12 1/16 x 7 9/16 x 7 9/16 | |
66 | 306 x 192 x 194 | 12 1/16 x 7 9/16 x 7 11/16 | |
67R | 231 x 175 x 176 | 9 1/8 x 6 7/8 x 6 15/16 | |
70 | 208 x 179 x 186 | 8 3/16 x 7 1/16 x 7 5/16 | |
71 | 208 x 179 x 216 | 8 3/16 x 7 1/16 x 8 1/2 | |
72 | 230 x 179 x 210 | 9 1/16 x 7 1/16 x 8 1/4 | |
73 | 230 x 179 x 216 | 9 1/16 x 7 1/16 x 8 1/2 | |
74 | 260 x 184 x 222 | 10 1/4 x 7 1/4 x 8 3/4 | |
75 | 230 x 179 x 186 | 9 1/16 x 7 1/16 x 7 5/16 | |
76 | 334 x 179 x 216 | 13 1/8 x 7 1/16 x 8 1/2 | |
77 | 306 x 184 x 222 | 12 1/16 x 7 1/4 x 8 3/4 | |
78 | 260 x 179 x 186 | 10 1/4 x 7 1/16 x 7 5/16 | 12V75Ah-ST (Car Starting Battery) |
79 | 307 x 179 x 188 | 12 1/16 x 7 1/16 x 7 3/8 | |
85 | 230 x 173 x 203 | 9 1/16 x 6 13/16 x 8 | |
86 | 230 x 173 x 203 | 9 1/16 x 6 13/16 x 8 | |
90 | 243 x 175 x 175 | 9 9/16 x 6 7/8 x 6 7/8 | |
91 | 280 x 175 x 175 | 11 x 6 7/8 x 6 7/8 | |
92 | 316 x 175 x 175 | 12 7/16 x 6 7/8 x 6 7/8 | |
93 | 354 x 175 x 175 | 13 15/16 x 6 7/8 x6 7/8 | |
94R | 315 x 175 x 190 | 12 7/16 x 6 7/8 x 7 1/2 | |
95R | 394 x 175 x 190 | 15 9/16 x 6 7/8 x 7 1/2 | |
96R | 242 x 175 x 175 | 9 1/2 x 6 7/8 x 6 7/8 | |
97R | 252 x 175 x 190 | 9 15/16 x 6 7/8 x 7 1/2 | |
98R | 283 x 175 x 190 | 11 1/8 x 6 7/8 x 7 1/2 | |
99 | 207 x 175 x 175 | 8 1/8 x 6 7/8 x 6 7/8 | |
99R | 210 x 175 x 175 | 8 1/4 x 6 7/8 x 6 7/8 | |
100 | 260 x 179 x 188 | 10 1/4 x 7 1/16 x 7 3/8 | |
101 | 260 x 179 x 170 | 10 1/4 x 7 1/16 x 6 11/16 | |
121R | 208 x 177 x 215 | 8 1/4 x 7 x 8 1/2 | |
124 | 265 x 175 x 214 | 10 7/16 x 6 7/8 x 8 7/16 | |
124R | 262 x 177 x 218 | 10 3/8 x 7 x 8 5/8 | |
151R | 188 x 125 x 225 | 7 7/16 x 4 15/16 x 8 7/8 | |
Passenger Car and Light Commercial 6V Batteries (3 Cells) | |||
1 | 232 x 181 x 238 | 9 1/8 x 7 1/8 x 9 3/8 | |
2 | 264 x 181 x 238 | 10 3/8 x 7 1/8 x 9 3/8 | |
2E | 492 x 105 x 232 | 19 3/8 x 4 1/8 x 9 1/8 | |
2N | 254 x 141 x 227 | 10 x 5 9/16 x 8 15/16 | |
17HF | 187 x 175 x 229 | 7 3/8 x 6 7/8 x 9 | |
19L | 216 x 178 x 191 | 8 1/2 x 7 x 7 1/2 | |
Heavy Duty Commercial and Special Tractor 12V Batteries (6 Cells) | |||
3EE | 491 x 111 x 225 | 19 5/16 x 4 3/8 x 8 7/8 | |
3ET | 491 x 111 x 249 | 19 5/16 x 4 3/8 x 9 13/16 | |
4D | 527 x 222 x 250 | 20 3/4 x 8 3/4 x 9 7/8 | |
4DLT | 508 x 208 x 202 | 20 x 8 3/16 x 7 15/16 | |
6D | 527 x 254 x 260 | 20 3/4 x 10 x 10 1/4 | |
8D | 527 x 283 x 250 | 20 3/4 x 11 1/8 x 9 7/8 | 12V300Ah 24V150Ah 24V210Ah 48V60Ah 48V100Ah |
12T | 179 x 177 x 202 | 7 1/16 x 6 15/16 x 7 15/16 | |
28 | 261 x 173 x 240 | 10 1/4 x 6 13/16 x 9 7/16 | |
29H | 334 x 171 x 232 | 13 1/8 x 6 3/4 x 9 1/8 | |
30H | 343 x 173 x 235 | 13 1/2 x 6 13/16 x 9 1/4 | |
31 | 330 x 173 x 240 | 13 x 6 13/16 x 9 7/16 | 12V100Ah 12V120Ah 12V150Ah 24V60Ah |
Heavy Duty Commercial and Special Tractor 6V Batteries (3 Cells) | |||
3 | 298 x 181 x 238 | 11 3/4 x 7 1/8 x 9 3/8 | |
3EH | 491 x 111 x 249 | 19 5/16 x 4 3/8 x 9 13/16 | |
4 | 334 x 181 x 238 | 13 1/8 x 7 1/8 x 9 3/8 | |
4EH | 491 x 127 x 249 | 19 5/16 x 5 x 9 13/16 | |
5D | 349 x 181 x 238 | 13 3/4 x 7 1/8 x 9 3/8 | |
7D | 413 x 181 x 238 | 16 1/4 x 7 1/8 x 9 3/8 | |
Electric Vehicle 6V Batteries (3 Cells) | |||
GC2 | 264 x 183 x 277 | 10 3/8 x 7 3/16 x 10 7/8 | |
GC2H | 264 x 183 x 295 | 10 3/8 x 7 3/16 x 11 5/8 | |
Electric Vehicle 8V Batteries (4 Cells) | |||
GC8 | 264 x 183 x 277 | 10 3/8 x 7 3/16 x 10 7/8 | |
GC8H | 264 x 183 x 295 | 10 3/8 x 7 3/16 x 11 5/8 | |
Electric Vehicle 12V Batteries (6 Cells) | |||
Group GC12 Batteries | 327 x 183 x 277 | 12 7/8 x 7 3/16 x 10 7/8 | |
Commercial/Marine 8V Batteries (4 Cells) | |||
981 | 527 x 191 x 273 | 20 3/4 x 7 1/2 x 10 3/4 | |
982 | 546 x 191 x 267 | 21 1/2 x 7 1/2 x 10 1/2 | |
983 | 622 x 191 x 267 | 24 1/2 x 7 1/2 x 10 1/2 | |
984 | 699 x 191 x 267 | 27 1/2 x 7 1/2 x 10 1/2 | |
985 | 683 x 216 x 273 | 26 7/8 x 8 1/2 x 11 3/4 | |
General Purpose 12V Batteries (6 Cells) | |||
Group U1 Batteries | 197 x 132 x 186 | 7 3/4 x 5 3/16 x 7 5/16 | |
Group U1R Batteries | 197 x 132 x 186 | 7 3/4 x 5 3/16 x 7 5/16 | |
U2 | 160 x 132 x 181 | 6 5/16 x 5 3/16 x 7 1/8 | |
Ordnance 12V Batteries (6 Cells) | |||
2H | 260 x 135 x 227 | 10 1/4 x 5 5/16 x 8 15/16 | |
6T | 286 x 267 x 230 | 11 1/4 x 10 1/2 x 9 1/16 | |
Ordnance 24V Batteries (12 Cells) | |||
4H | 273 x 262 x 229 | 10 3/4 x 10 5/16 x 9 | |
Floor Scrubber 6V Commercial Batteries (3 Cells) | |||
901 | 298 x 181 x 302 | 11 3/4 x 7 1/8 x 11 7/8 | |
902 | 302 x 181 x 371 | 12 x 7 1/8 x 14 5/8 | |
903 | 302 x 181 x 432 | 12 x 7 1/8 x 17 | |
Floor Scrubber 12V Commercial Batteries (6 Cells) | |||
920 | 356 x 171 x 311 | 14 x 6 3/4 x 12 1/2 | |
921 | 397 x 181 x 378 | 15 3/4 x 7 1/8 x 14 7/8 |
Data excerpted from the BCI Battery Replacement Data Book.
Note 1: The maximum height mentioned includes the terminal posts. Width and length measurements typically account for the widest point, encompassing protruding flanges, except for hold-down flanges at the battery’s bottom. For comprehensive details, refer to the diagrams available in the BCI Battery Replacement Data Book.
Note 2: Contact Redway for custom order details.
BCI Battery Groups, DIN, and EN Codes Cross Reference Chart
BCI Battery Groups, DIN, and EN Codes Cross Reference Chart compares battery standards globally. BCI codes are used in North America, while DIN and EN codes are common in Europe. This chart aids in finding equivalent batteries across standards, ensuring compatibility for international applications.
The following cross-reference chart lists the most popular BCI battery groups and their DIN and EN equivalent codes:
Maximum BCI Battery Dimensions (L x W x H, inch/mm) |
BCI Group | Maximum DIN/EN Battery Dimensions (L x W x H mm) |
DIN Codes | EN Codes |
10 15/16 x 6 7/8 x 6 7/8 277 x 175 x 175 |
40R | 278 x 175 x 175 | T6, LB3 | 66LB |
11 3/16 x 6 7/8 x 6 7/8 293 x 175 x 175 |
41 | 293 x 175 x 175 | T65 | 54LB |
9 5/16 x 6 13/16 x 6 13/16 237 x 173 x 173 |
42 | 242 x 175 x 175 | T5, LB2 | 45LB |
9 7/16 x 6 7/8 x 7 1/2 242 x 175 x 190 |
47 | 242 x 175 x 190 | H5, L2 | 55L2 |
11 x 6 7/8 x 7 1/2 278 x 175 x 190 |
48 | 278 x 175 x 190 | H6, L3 | 66L3 |
13 15/16 x 6 7/8 x 7 1/2 354 x 175 x 190 |
49 | 354 x 175 x 190 | H8, L5 | 88L5 |
9 11/16 x 6 7/8 x 6 7/8 246 x 175 x 175 |
90 | 242 x 175 x 175 | T5, LB2 | 45LB |
11 x 6 7/8 x 6 7/8 280 x 175 x 175 |
91 | 278 x 175 x 175 | T6, LB3 | 66LB |
12 1/2 x 6 7/8 x 6 7/8 317 x 175 x 175 |
92 | 315 x 175 x 175 | T7, LB4 | 77LB |
15 x 6 7/8 x 6 7/8 354 x 175 x 175 |
93 | 354 x 175 x 175 | T8, LB5 | 88LB |
12 7/16 x 6 7/8 x 7 1/2 315 x 175 x 190 |
94R | 315 x 175 x 190 | H7, L4 | 77L4 |
15 9/16 x 6 7/8 x 7 1/2 394 x 175 x 190 |
95R | 394 x 175 x 190 | H9, L6 | – |
9 15/16 x 6 7/8 x 7 1/2 252 x 175 x 190 |
97R | 252 x 175 x 190 | H5, L2 | 55L2 |
11 1/8 x 6 7/8 x 7 1/2 283 x 175 x 190 |
98R | 283 x 175 x 190 | H6, L3 | 66L3 |
8 1/8 x 6 7/8 x 6 7/8 207 x 175 x 175 |
99 | 207 x 175 x 175 | T4, LB1 | 36LB |
8 1/4 x 6 7/8 x 6 7/8 210 x 175 x 175 |
99R | 210 x 175 x 175 | T4, LB1 | 36LB |
– | – | 175 x 175 x 190 | H3, L0 | 32L0 |
– | – | 297 x 175 x 190 | H4, L1 | 45L1 |
Comparison of Small 12V Deep Cycle General-Purpose Batteries
Comparison of Small 12V Deep Cycle General-Purpose Batteries assesses options for capacity, lifespan, and versatility. Commonly used in marine, RV, and off-grid systems, these batteries vary in amp-hour rating, cycle life, and maintenance needs. Consider these factors when selecting the ideal battery for specific applications
Small 12V deep cycle/general purpose batteries are mostly Sealed Lead-Acid (SLA) or Lithium Iron Phosphate (LiFePO4) batteries, typically used in UPS devices, alarms, toys, wheelchairs, and similar.
Most popular models are batteries with smaller capacities, usually up to 30-35Ah, where standard Group U1 and U1R batteries kick in.
If you are looking for even larger deep cycle/general purpose batteries, consider one of the larger battery groups, like groups 24, 27, 31, etc.
The following comparison chart lists some of the most popular small 12V general-purpose batteries with their dimensions and terminals.
Nominal Capacity | Dimensions inches (L x W x H) |
Dimensions mm (L x W x H) |
Terminals |
12V 2.9Ah | 3.11 x 2.20 x 3.90 inches | 79 x 56 x 99 mm | F1 (T1) |
12V 3.5Ah | 5.28 x 2.64 x 2.38 inches | 134 x 67 x 61 mm | F1 (T1) |
12V 4Ah | 3.54 x 2.76 x 3.98 inches | 90 x 70 x 101 mm | F1 (T1) |
12V 5Ah | 3.54 x 2.76 x 3.98 inches | 90 x 70 x 101 mm | F1 (T1) |
12V 7Ah | 5.94 x 2.56 x 3.7 inches | 151 x 65 x 94 mm | F1 (mostly) |
12V 9Ah | 5.94 x 2.56 x 3.7 inches | 151 x 65 x 94 mm | F2 (mostly) |
12V 10Ah | 5.94 x 2.56 x 4.37 inches | 151 x 65 x 111 mm | F2 (T2) (mostly) |
12V 12Ah | 5.94 x 3.86 x 3.98 inches | 151 x 98 x 101 mm | F2 (mostly) |
12V 15Ah | 5.94 x 3.86 x 3.98 inches | 151 x 98 x 101 mm | F2 |
12V 18Ah, 19Ah, 20Ah+ | 7.15 x 3.03 x 6.59 inches | 181 x 77 x 167 mm | T3 (NB), M5, M6 |
12V 26Ah | 6.89 x 6.54 x 4.94 inches | 175 x 166 x 126 mm | NB |
12V 30Ah | 6.50 x 4.90 x 6.90 inches | 165 x 125 x 175 mm | T3 (NB) |
12V 35Ah | 7.68 x 5.12 x 6.46 inches | 195 x 130 x 164 mm | T6 (NB) |
12V 35Ah (U1, U1R) | 7.75 x 5.18 x 7.31 inches | 197 x 132 x 186 mm | NB |
12V 55Ah | 9.04 x 5.45 x 8.15 inches | 230 x 139 x 207 mm | T6 (NB) |
12V 80Ah | 10.16 x 6.65 x 8.20 inches | 258 x 169 x 208 mm | T6 (NB) |
What happens if I use the wrong group size battery?
Using the wrong group size battery can cause fitment issues, electrical problems, performance issues, and safety hazards. Improper fitment may damage the battery or the vehicle. Incorrect specifications can lead to undercharging/overcharging, damaging components, and difficulty starting the vehicle. Consult manuals or mechanics to ensure proper selection and avoid these issues.
Using the wrong group size battery for your vehicle can lead to various issues:
- Fitment Problems: Batteries come in different sizes and shapes. Using a battery with the wrong group size may not fit properly in your vehicle’s battery compartment. This can lead to physical damage to the battery, the vehicle, or both.
- Electrical Compatibility: Batteries are designed to provide a specific voltage and capacity suitable for the vehicle’s electrical system. Using a battery with the wrong specifications can lead to electrical problems such as undercharging or overcharging, which may damage sensitive electronic components like the alternator or the vehicle’s computer systems.
- Performance Issues: A battery with the wrong group size may not provide enough cranking power (CCA – Cold Cranking Amps) or reserve capacity to start the engine reliably or power auxiliary systems. This can result in difficulty starting the vehicle, especially in cold weather, or frequent battery failures.
- Safety Concerns: In extreme cases, using an improperly sized battery can pose safety hazards such as leaking electrolyte, overheating, or even explosion due to excessive charging or discharging.
To avoid these issues, always consult your vehicle’s owner’s manual or seek advice from a professional mechanic to ensure you select the correct group size battery for your vehicle.
How to Choose the Right Battery Group Size
Choosing the right battery group size is crucial for optimal car performance and longevity. Using an incorrect size can result in poor connections, reduced power, and starting difficulties, especially in cold weather. It may also harm the charging system, leading to early failure. Ensure compatibility with your car’s power needs for reliability and cost savings.
- Impact of Wrong Size: Using an incorrect battery group size results in poor connections, reduced power, and difficulties starting, especially in cold weather. It can lead to vibrations that harm other car parts.
- Charging System Effects: Mismatched sizes affect the charging system, potentially causing early failure of both the battery and alternator, impacting their ability to charge properly.
- System Compatibility: Each car model has specific power needs. Selecting the right group size ensures compatibility, optimizing performance, and preventing potential damage to your car’s electrical system.
Investing time in research or seeking expert advice to choose the right battery group size pays off in reliability and cost savings for your vehicle.
Different Car Battery Types and Corresponding Group Sizes
Different car battery types include lead-acid, AGM, and lithium-ion, tailored for various vehicles. Common group sizes like 24, 27, 34, 35, 48, 49, 65, and 78 suit passenger vehicles, while larger ones like 8D are for bigger vehicles. Choose based on your vehicle’s needs for optimal performance and longevity, referring to manufacturer recommendations or a Battery Group Size Chart Guide.
- Lead-Acid Batteries: Budget-friendly and reliable, available in various group sizes like Group 24 or Group 31, tailored to fit your car’s dimensions and power needs.
- AGM Batteries: These batteries use a soaked mat instead of liquid electrolyte, offering top-notch performance and durability, making them ideal for vehicles with high electrical demands.
- Specialized Batteries like Lithium-Ion: Hybrid or electric cars might require lithium-ion batteries with higher energy density and longer lifespans, despite being pricier.
Ensure your battery matches your vehicle’s needs by referring to the manufacturer’s recommendations or using a Battery Group Size Chart Guide. Selecting the right group size guarantees peak battery performance and prevents potential damage to your car’s electrical system. Understanding the different types of car batteries and their corresponding group sizes is essential for long-term savings and maintaining smooth vehicle operation.
How to Determine Car Battery Group Size
To determine your car’s battery group size, consult the owner’s manual or inspect the existing battery for alphanumeric codes like 24F or H6. Seek assistance from a mechanic or auto parts store if needed. Choosing the correct size is crucial for optimal vehicle performance and prevents damage to the charging system.
- Check the Owner’s Manual: Consult your car’s manual, as it often specifies the recommended battery group size for your make and model.
- Inspect the Existing Battery: Examine your current battery for a label or stamp with alphanumeric codes like 24F or H6 – these indicate the specific group size.
- Seek Professional Help: When in doubt, consult a mechanic or visit an auto parts store for assistance. They have tools and expertise to identify the right battery group size for your vehicle.
Choosing the correct battery group size is crucial to prevent electrical issues and potential damage to your car’s charging system. Ensure accuracy for optimal vehicle performance and the longevity of your car’s electrical components.
What are the most popular battery group sizes?
Popular battery group sizes for vehicles include Group 24 for compact cars, Group 35 for compact cars and light trucks, and Group 48 (H6) for full-size sedans, SUVs, and trucks. Other common sizes are Group 49 (H8) for SUVs, Group 51R for compact cars and hybrids, Group 65 for trucks, SUVs, and performance cars, and Group 78 (H7) for SUVs and trucks. Consult your vehicle’s manual or a professional for the appropriate size.
Group 24: Typically used in smaller vehicles such as compact cars and some mid-size sedans.
Group 35: Commonly found in compact cars, small to mid-size sedans, and some light trucks.
Group 48 (H6): Used in larger vehicles such as full-size sedans, SUVs, and trucks.
Group 49 (H8): Often used in larger vehicles with higher electrical demands, such as SUVs, trucks, and luxury cars.
Group 51R: Commonly used in smaller vehicles with limited space for the battery, such as compact cars and some hybrids.
Group 65: Found in larger vehicles with higher electrical demands, such as trucks, SUVs, and performance cars.
Group 78 (H7): Used in larger vehicles, including some SUVs, trucks, and full-size sedans.
These are just a few examples, and there are many other group sizes available to accommodate the diverse range of vehicles on the market. It’s essential to consult your vehicle’s owner’s manual or consult with a professional to determine the appropriate battery group size for your specific vehicle.
How to Maintain Car Battery
Maintain your car battery with these tips: Inspect for corrosion and loose connections, clean terminals with a baking soda-water mix, minimize electrical accessory use when the engine is off, drive regularly, protect from extreme temperatures, test the charging system periodically, and learn jump-starting. Ensure longevity by caring for components like belts for overall vehicle health.
- Regular Inspections: Check for corrosion, loose connections, and leaks regularly. Clean terminals to maintain a solid connection.
- Keep it Clean: Clean the battery with a baking soda-water mix to gently remove buildup on terminals, promoting optimal performance.
- Mind Electrical Use: Minimize the use of electrical accessories when the engine is off to avoid draining the battery.
- Drive Regularly: Drive the car at least once a week for a reasonable distance to prevent decreased battery life and keep it charged.
- Temperature Protection: Extreme temperatures impact battery performance. Park in shaded areas during summer and use insulation blankets in winter.
- Charging System Check: Test the car’s charging system occasionally to catch issues early and prevent battery-related problems.
- Learn Jump-Starting: Understand how to safely jump-start a dead battery; it’s a valuable skill for emergencies.
Group Size | LxWxH (inches) | LxWxH (mm) |
Group 24 Batteries | 10.25 x 6.8125 x 8.875 | 260 x 173 x 225 |
Group 27 Batteries | 12.0625 x 6.8125 x 8.875 | 306 x 173 x 225 |
Group 31 Batteries | 13 x 6.8125 x 9.4375 | 330 x 173 x 240 |
Group 34 Batteries | 10.25 x 6.8125 x 7.875 | 260 x 173 x 200 |
Group 35 Batteries | 9.0625 x 6.875 x 8.875 | 230 x 175 x 225 |
Group 51 and 51R Batteries | 9.374 x 5.0625 x 8.8125 | 238 x 129 x 223 |
Group 65 Batteries | 12.0625 x 7.5 x 7.5625 | 306 x 190 x 192 |
Group 78 Batteries | 10.25 x 7.0625 x 7.3125 | 260 x 179 x 186 |
Maintaining your car’s battery goes beyond fluid checks; caring for components like belts contributes to overall vehicle health and longevity.