BCI Battery Group Size Chart

Knowing the exact BCI group battery size helps to find new battery replacements, however, knowing just the BCI group size is often not enough.

Batteries also differ in their:

  • purpose: starting, dual-purpose, deep cycle,
  • cell type: AGM, gel cell, flooded cell,
  • chemistry: lead-acid, NiCd, NiMH, lithium, etc.

Other important information includes details like terminal number, type, and orientation, battery maintenance, housing material, etc.

Knowing all this information significantly helps to find proper battery replacement.

The most common battery groups and their dimensions in inches and centimeters are:

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 7.3125 26 x 17.9 x 18.6

When replacing the old battery with the new one, be sure that the new one is of the same chemistry as the old one (or it is a verified "drop-in replacement" battery) and that it has the same or better electrical features.

The following BCI battery group size chart lists the most common BCI battery sizes.

Note: we have really tried to verify the information provided in this table, but there are no warranties of any kind. Also, for the full list of motorcycle and similar batteries, please check our Powersports, ATV, and Motorcycle Battery Cross Reference Chart page.

BCI Group Size L x W x H (mm) L x W x H (inches) Amazon Search
21 208 x 173 x 222 8 3/16 x 6 13/16 x 8 3/4 Group 21 Battery
21R 208 x 173 x 222 8 3/16 x 6 13/16 x 8 3/4 Group 21R Battery
22F 241 x 175 x 211 9 1/2 x 6 7/8 x 8 5/16 Group 22F Battery
22HF 241 x 175 x 229 9 1/2 x 6 7/8 x 9 Group 22HF Battery
Group 22NF Batteries 240 x 140 x 227 9 7/16 x 5 1/2 x 8 15/16 Group 22NF Battery
22R 229 x 175 x 211 9 x 6 7/8 x 8 5/16 Group 22R Battery
Group 24 Batteries 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
25 230 x 173 x 225 9 1/16 x 6 7/8 x 8 7/8 Group 25 Battery
Group 26 Battery 208 x 173 x 197 8 3/16 x 6 13/16 x 7 3/4 Group 26 Battery
Group 26R Battery 208 x 173 x 197 8 3/16 x 6 13/16 x 7 3/4 Group 26R Battery
Group 27 Battery 306 x 173 x 225 12 1/16 x 6 13/16 x 8 7/8 Group 27 Battery
27F 318 x 173 x 227 12 1/2 x 6 13/16 x 8 15/16 Group 27F Battery
27H 298 x 173 x 235 11 3/4 x 6 13/16 x 9 1/4 Group 27H Battery
29NF 330 x 140 x 227 13 x 5 1/2 x 8 15/16 Group 29NF Battery
33 338 x 173 x 238 13 5/16 x 6 13/16 x 9 3/8 Group 33 Battery
Group 34 Battery 260 x 173 x 200 10 1/4 x 6 13/16 x 7 7/8 Group 34 Battery
Group 34R Battery 260 x 173 x 200 10 1/4 x 6 13/16 x 7 7/8 Group 34R Battery
Group 35 Battery 230 x 175 x 225 9 1/16 x 6 7/8 x 8 7/8 Group 35 Battery
36R 263 x 183 x 206 10 3/8 x 7 3/16 x 8 1/8 Group 36R Battery
40R 278 x 175 x 175 11 x 6 15/16 x 6 15/16 Group 40R Battery
41 293 x 175 x 175 11 9/16 x 6 15/16 x 6 15/16 Group 41 Battery
42 242 x 175 x 175 9 9/16 x 6 15/16 x 6 15/16 Group 42 Battery
43 334 x 175 x 205 13 1/8 x 6 7/8 x 8 1/16 Group 43 Battery
45 240 x 140 x 227 9 7/16 x 5 1/2 x 8 15/16 Group 45 Battery
46 273 x 173 x 229 10 3/4 x 6 13/16 x 9 Group 46 Battery
Group 47 Batteries 242 x 175 x 190 9 9/16 x 6 7/8 x 7 1/2 Group 47 Battery
Group 48 Batteries 278 x 175 x 190 11 x 6 7/8 x 7 1/2 Group 48 Battery
Group 49 Batteries 354 x 175 x 190 13 15/16 x 6 7/8 x 7 1/2 Group 49 Battery
50 343 x 127 x 254 13 1/2 x 5 x 10 Group 50 Battery
Group 51 Batteries 238 x 129 x 223 9 3/8 x 5 1/16 x 8 3/4 Group 51 Battery
Group 51R Batteries 238 x 129 x 223 9 3/8 x 5 1/16 x 8 3/4 Group 51R Battery
52 186 x 147 x 210 7 5/16 x 5 13/16 x 8 1/4 Group 52 Battery
53 330 x 119 x 210 13 x 4 11/16 x 8 1/4 Group 53 Battery
54 186 x 154 x 212 7 5/16 x 6 1/16 x 8 3/8 Group 54 Battery
55 218 x 154 x 212 8 9/16 x 6 1/16 x 8 3/8 Group 55 Battery
56 254 x 154 x 212 10 x 6 1/16 x 8 3/8 Group 56 Battery
57 205 x 183 x 177 8 1/16 x 7 3/16 x 6 15/16 Group 57 Battery
Group 58 Batteries 255 x 183 x 177 10 1/16 x 7 3/16 x 6 15/16 Group 58 Battery
Group 58R Batteries 255 x 183 x 177 10 1/16 x 7 3/16 x 6 15/16 Group 58R Battery
59 255 x 193 x 196 10 1/16 x 7 5/8 x 7 3/4 Group 59 Battery
60 332 x 160 x 225 13 1/16 x 6 5/16 x 8 7/8 Group 60 Battery
61 192 x 162 x 225 7 9/16 x 6 3/8 x 8 7/8 Group 61 Battery
62 225 x 162 x 225 8 7/8 x 6 3/8 x 8 7/8 Group 62 Battery
63 258 x 162 x 225 10 3/16 x 6 3/8 x 8 7/8 Group 63 Battery
64 296 x 162 x 225 11 5/8 x 6 3/8 x 8 7/8 Group 64 Battery
Group 65 Batteries 306 x 192 x 192 12 1/16 x 7 9/16 x 7 9/16 Group 65 Battery
66 306 x 192 x 194 12 1/16 x 7 9/16 x 7 11/16 Group 66 Battery
67R 231 x 175 x 176 9 1/8 x 6 7/8 x 6 15/16 Group 67R Battery
70 208 x 179 x 186 8 3/16 x 7 1/16 x 7 5/16 Group 70 Battery
71 208 x 179 x 216 8 3/16 x 7 1/16 x 8 1/2 Group 71 Battery
72 230 x 179 x 210 9 1/16 x 7 1/16 x 8 1/4 Group 72 Battery
73 230 x 179 x 216 9 1/16 x 7 1/16 x 8 1/2 Group 73 Battery
74 260 x 184 x 222 10 1/4 x 7 1/4 x 8 3/4 Group 74 Battery
Group 75 Batteries 230 x 179 x 186 9 1/16 x 7 1/16 x 7 5/16 Group 75 Battery
76 334 x 179 x 216 13 1/8 x 7 1/16 x 8 1/2 Group 76 Battery
77 306 x 184 x 222 12 1/16 x 7 1/4 x 8 3/4 Group 77 Battery
Group 78 Batteries 260 x 179 x 186 10 1/4 x 7 1/16 x 7 5/16 Group 78 Battery
79 307 x 179 x 188 12 1/16 x 7 1/16 x 7 3/8 Group 79 Battery
Group 85 Batteries 230 x 173 x 203 9 1/16 x 6 13/16 x 8 Group 85 Battery
Group 86 Batteries 230 x 173 x 203 9 1/16 x 6 13/16 x 8 Group 86 Battery
90 243 x 175 x 175 9 9/16 x 6 7/8 x 6 7/8 Group 90 Battery
91 280 x 175 x 175 11 x 6 7/8 x 6 7/8 Group 91 Battery
92 316 x 175 x 175 12 7/16 x 6 7/8 x 6 7/8 Group 92 Battery
93 354 x 175 x 175 13 15/16 x 6 7/8 x6 7/8 Group 93 Battery
Group 94R Batteries 315 x 175 x 190 12 7/16 x 6 7/8 x 7 1/2 Group 94R Battery
Group 95R Batteries 394 x 175 x 190 15 9/16 x 6 7/8 x 7 1/2 Group 95R Battery
Group 96R Batteries 242 x 175 x 175 9 1/2 x 6 7/8 x 6 7/8 Group 96R Battery
97R 252 x 175 x 190 9 15/16 x 6 7/8 x 7 1/2 Group 97R Battery
98R 283 x 175 x 190 11 1/8 x 6 7/8 x 7 1/2 Group 98R Battery
99 207 x 175 x 175 8 1/8 x 6 7/8 x 6 7/8 Group 99 Battery
99R 210 x 175 x 175 8 1/4 x 6 7/8 x 6 7/8 Group 99R Battery
100 260 x 179 x 188 10 1/4 x 7 1/16 x 7 3/8 Group 100 Battery
101 260 x 179 x 170 10 1/4 x 7 1/16 x 6 11/16 Group 101 Battery
121R 208 x 177 x 215 8 1/4 x 7 x 8 1/2 Group 121R Battery
124 265 x 175 x 214 10 7/16 x 6 7/8 x 8 7/16 Group 124 Battery
124R 262 x 177 x 218 10 3/8 x 7 x 8 5/8 Group 124R Battery
151R 188 x 125 x 225 7 7/16 x 4 15/16 x 8 7/8 Group 151R Battery
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 Group 1 Battery
2 264 x 181 x 238 10 3/8 x 7 1/8 x 9 3/8 Group 2 Battery
2E 492 x 105 x 232 19 3/8 x 4 1/8 x 9 1/8 Group 2E Battery
2N 254 x 141 x 227 10 x 5 9/16 x 8 15/16 Group 2N Battery
17HF 187 x 175 x 229 7 3/8 x 6 7/8 x 9 Group 17HF Battery
19L 216 x 178 x 191 8 1/2 x 7 x 7 1/2 Group 19L Battery
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 Group 3EE Battery
3ET 491 x 111 x 249 19 5/16 x 4 3/8 x 9 13/16 Group 3ET Battery
Group 4D Batteries 527 x 222 x 250 20 3/4 x 8 3/4 x 9 7/8 Group 4D Battery
4DLT 508 x 208 x 202 20 x 8 3/16 x 7 15/16 Group 4DLT Battery
Group 6D Batteries 527 x 254 x 260 20 3/4 x 10 x 10 1/4 Group 6D Battery
Group 8D Batteries 527 x 283 x 250 20 3/4 x 11 1/8 x 9 7/8 Group 8D Battery
12T 179 x 177 x 202 7 1/16 x 6 15/16 x 7 15/16 Group 12T Battery
28 261 x 173 x 240 10 1/4 x 6 13/16 x 9 7/16 Group 28 Battery
29H 334 x 171 x 232 13 1/8 x 6 3/4 x 9 1/8 Group 29H Battery
30H 343 x 173 x 235 13 1/2 x 6 13/16 x 9 1/4 Group 30H Battery
Group 31 Batteries 330 x 173 x 240 13 x 6 13/16 x 9 7/16 Group 31 Battery
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 Group 3 Battery
3EH 491 x 111 x 249 19 5/16 x 4 3/8 x 9 13/16 Group 3EH Battery
4 334 x 181 x 238 13 1/8 x 7 1/8 x 9 3/8 Group 4 Battery
4EH 491 x 127 x 249 19 5/16 x 5 x 9 13/16 Group 4EH Battery
5D 349 x 181 x 238 13 3/4 x 7 1/8 x 9 3/8 Group 5D Battery
7D 413 x 181 x 238 16 1/4 x 7 1/8 x 9 3/8 Group 7D Battery
Electric Vehicle 6V Batteries (3 Cells)
Group GC2 Batteries 264 x 183 x 277 10 3/8 x 7 3/16 x 10 7/8 Group GC2 Battery
Group GC2H Batteries 264 x 183 x 295 10 3/8 x 7 3/16 x 11 5/8 Group GC2H Battery
Electric Vehicle 8V Batteries (4 Cells)
Group GC8 Batteries 264 x 183 x 277 10 3/8 x 7 3/16 x 10 7/8 Group GC8 Battery
Group GC8H Batteries 264 x 183 x 295 10 3/8 x 7 3/16 x 11 5/8 Group GC8H Battery
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 Group GC12 Battery
Commercial/Marine 8V Batteries (4 Cells)
981 527 x 191 x 273 20 3/4 x 7 1/2 x 10 3/4 Group 981 Battery
982 546 x 191 x 267 21 1/2 x 7 1/2 x 10 1/2 Group 982 Battery
983 622 x 191 x 267 24 1/2 x 7 1/2 x 10 1/2 Group 983 Battery
984 699 x 191 x 267 27 1/2 x 7 1/2 x 10 1/2 Group 984 Battery
985 683 x 216 x 273 26 7/8 x 8 1/2 x 11 3/4 Group 985 Battery
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 U1 Battery
Group U1R Batteries 197 x 132 x 186 7 3/4 x 5 3/16 x 7 5/16 Group U1R Battery
U2 160 x 132 x 181 6 5/16 x 5 3/16 x 7 1/8 Group U2 Battery
Ordnance 12V Batteries (6 Cells)
2H 260 x 135 x 227 10 1/4 x 5 5/16 x 8 15/16 Group 2H Battery
6T 286 x 267 x 230 11 1/4 x 10 1/2 x 9 1/16 Group 6T Battery
Ordnance 24V Batteries (12 Cells)
4H 273 x 262 x 229 10 3/4 x 10 5/16 x 9 Group 4H Battery
Floor Scrubber 6V Commercial Batteries (3 Cells)
901 298 x 181 x 302 11 3/4 x 7 1/8 x 11 7/8 Group 901 Battery
902 302 x 181 x 371 12 x 7 1/8 x 14 5/8 Group 902 Battery
903 302 x 181 x 432 12 x 7 1/8 x 17 Group 903 Battery
Floor Scrubber 12V Commercial Batteries (6 Cells)
920 356 x 171 x 311 14 x 6 3/4 x 12 1/2 Group 920 Battery
921 397 x 181 x 378 15 3/4 x 7 1/8 x 14 7/8 Group 921 Battery

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

Many BCI battery groups differ by only a fraction of an inch, and they can be used interchangeably, if and only if the new battery:

  • can fit your battery compartment with properly oriented terminals,
  • have the same or better specifications/features than the old battery,
  • can be properly charged.

Even then, be sure to check with professionals if the replacement with another battery group is a safe option. If not, the operation of the new battery may cause damage, injuries, or even worse ...

BCI Battery Groups, and DIN and EN Codes - Cross Reference Chart

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

This cross-reference chart lists 'only' the battery dimensions and not the orientation of their terminals, terminal types, base hold-down type, lifting edge, and other 'little,' but sometimes very important details.

Most of the battery groups in the list feature very similar dimensions, except two models, BCI Group 48 and BCI Group 49.

For example: BCI Group 48 batteries feature physical dimensions of 278 x 175 x 192 mm, with the positive terminal location: Right. BCI Group 48 batteries are considered to be equivalent to the DIN/EN battery groups labeled as H6, L3, and 66L3, with physical dimensions of 278 x 175 x 190 mm, with the positive terminal location: Right.

However, BCI Battery Group 98R batteries feature physical dimensions of 283 x 175 x 190 mm, with the positive terminal location: Right, and is an also a good match to the DIN/EN battery groups labeled as H6, L3, and/or 66L3 - Group 98R batteries are ~5 mm longer than H6 batteries, but they generally can fit the battery compartments intended for H6 batteries.

Again, when replacing your battery on your own, always check the actual battery size and measure your battery compartment. Also, check battery orientation, terminal types, hold-down system, etc.


Here is the list of our BCI Group Battery Size articles, ordered according to the date added:

Group 47 (H5, L2, 55L2) Batteries - Dimensions, Features, and Recommendations

group 47 mGroup 47 (H5, L2, 55L2) batteries are medium size batteries, mostly used in automotive and light industrial applications as cranking or dual-purpose batteries for starting mid-range diesel and gas engines and for powering various electric and electronic devices while the main engine(s) are turned off.

Most BCI Group 47 (H5, L2, 55L2) batteries are designed as spill-proof, maintenance-free AGM batteries, but there are also other models on the market as well.

Updated: March 13, 2023.

Group 95R (H9/L6) Battery: The Complete Guide

95r battery mGroup 95R (H9/L6) batteries are very popular automotive batteries typically used in cars like SUVs, sedans, pickups, etc.

Thanks to their size, capacity, and ability to crank large internal combustion engines, group 95R (H9/L6) batteries are also used as light industrial starting/dual-purpose batteries and as needed, for example, in emergencies, as backup batteries, in medical and security systems, etc. But, group 95R (H9/L6) batteries are most commonly used as automotive batteries.

Published: March 6, 2023.

Group 24 Batteries - Dimensions, Features, and Recommendations

group24batteries 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: February 14, 2023.

Group 35 Batteries - Dimensions, Features, and Recommendations

group35batteries mBCI Group 35 batteries are very popular battery size of lead-acid batteries, commonly used in cars, trucks, RVs, and other similar applications as starting or dual-purpose batteries.

These batteries, especially dual-purpose and deep cycle batteries, are often used in other applications as well, like UPS batteries, wheelchair batteries, security system backup batteries, medical applications, off-the-grid, etc.

The most popular BCI Group 35 batteries are Absorbent Glass Mat (AGM) Sealed Lead Acid (SLA) batteries, but lithium iron phosphate (LiFePO4) batteries are slowly entering the market, especially for dual-purpose applications.

Updated: January 9, 2023.

Group 65 Batteries - Dimensions, Features, and Recommendations

bci group 65 batteryBCI Group 65 batteries are commonly used as automotive, marine, and industrial batteries. They are mid-size batteries, often designed as dual-purpose AGM batteries suitable as both starting and deep cycle batteries, thanks to the advances in AGM SLA battery technology.

Generally, group 65 batteries feature 70-75 Ah 20h capacity, 130-150 minutes RC, 750-950 CCA, with the MCA values of some models reaching almost 1100 Amps. Also, they usually weigh between 45 and 55 pounds (20 - 25 kg).

Lithium-ion BCI Group 65 batteries are not as common as AGM batteries, but they slowly appear on the market, offering many advantages over AGM batteries but also having certain limitations.

Updated: December 8, 2022.

Group 31 Batteries - Dimensions, Features, and Recommendations

odyssey 31m pc2150st m battery mGroup 31 batteries are relatively large and powerful batteries, featuring 20h capacity in 75-125 Ah range, providing 750-1250 CCA, 150-250 minutes RC, etc. Their physical dimensions are approximately 13 x 6 13/16 x 9 7/16 inches (~13 x 6.8 x 9.44 inches, 330 x 173 x 240 mm), while their features depend on the battery design, intended use, chemistry, and similar.

Group 31 batteries are very common in marine, automotive, off-the-grid and similar applications, making them one of the most popular battery groups.

Updated: October 6, 2022.

Group 58 and 58R Batteries: Alternatives and Recommendations

group 58 battery mGroup 58 and 58R batteries are mid-size cranking batteries used in some passenger cars, sedans, SUVs, and even boats as affordable and reliable Starting, Lighting, and Ignition (SLI) battery.

Group 58 and group 58R batteries share the same dimensions but different battery terminal orientations. Also, many brands that offer both group 58 and group 58R batteries offer batteries that are internally different - group 58R batteries often have better discharge characteristics than group 58 batteries.

Published: October 5, 2022.

BCI Group 96R Batteries - Dimensions, Features, and Recommendations

group 96r mBCI Group 96R Batteries are almost exclusively used as starting batteries in cars and other similar applications where affordable and reliable starting batteries that can provide 500-600 CCA are required.

As such, most BCI group 96R batteries are wet/flooded lead-acid batteries, with only a very few AGM, Gel-Cell, or lithium batteries being present on the market. If such batteries are required, one must look for AGM, Gel-Cell, and/or lithium batteries of similarly sized BCI groups, taking into account battery size, capacity, terminal types, terminal orientation, hold-down type/shape, etc.

Updated: September 26, 2022.

Group 49 (H8, L5, 88L5) Batteries - Dimensions, Features, and Recommendations

acdelco 49agm w150px

BCI Group 49 or Group H8 are very popular car/truck batteries, commonly used not only as starting/cranking batteries but also as dual-purpose batteries, used for powering various loads while the main engine is turned off, like various winches, pumps, multimedia devices, etc.

While BCI Group 49 and Group H8 (or Group L5 or Group 88L5) are considered interchangeable, there are a few important differences one has to know before buying any of these batteries.

Updated: June 30, 2022.

Group 4D, 6D, and 8D Batteries - Dimensions, Features, and Recommendations

ampere time 12v 300ah lithium m

BCI Group 4D, 6D, and 8D batteries are large and heavy commercial batteries, often used for off-the-grid applications, as solar batteries, as RV house batteries, for security, medical and standby applications, for powering various industrial vehicles and applications, etc.

BCI Group 4D, 6D, and 8D lead-acid batteries were commonly Absorbent Glass Mat (AGM) or Gel-Cell Sealed Lead Acid (SLA) batteries, but are now being phased out in favor of Lithium Iron Phosphate (LiFePO4) 4D, 6D, and 8D batteries.

But, AGM and Gel-Cell lead-acid batteries are still going on strong in applications where lightweight design and high cycling abilities are not of greatest importance.

Updated: February 23, 2022.

BCI Group 85 and Group 86 Batteries - Dimensions, Features, and Recommendations

odyssey group75 86 w150pxBCI Group 85 and Group 86 batteries share the very same physical dimensions, with the only difference being the battery terminals orientation.

BCI Group 85 and 86 batteries are designed mostly as starting/cranking batteries and are, as such, commonly used in automotive and marine applications for starting smaller and mid-range gas and diesel engines.

Published: February 17, 2022.

BCI Group 22NF Battery

group 22nf mBCI Group 22NF battery is a general-purpose mid-range battery used as backup/standby battery, wheelchair battery, trolling motor battery, off-the-grid battery, as starting battery for smaller gas and diesel engines, and similar.

As such, 22NF battery is manufactured by many battery brands as wet/flooded, AGM, Gel-Cell lead-acid battery. Also, lithium 22NF batteries are also emerging on the market, offering great weight savings and other benefits.

Published: November 13, 2021.

Group 26 And Group 26R - Dimensions and Features

group 26 mBCI Group 26 and BCI Group 26R batteries are mid-range starting batteries used very often in cars, SUVs, smaller trucks, power generators, smaller boats, etc.

BCI Group 26 and 26R batteries feature practically the same dimensions, electric features, and terminal types, with the only difference being terminal orientation.

Published: September 9, 2021.

Group 94R Batteries - Dimensions, Features and Recommendations

bci group 94r mBCI Group 94R batteries are very popular automotive and light industrial batteries, commonly used on the passenger and light commercial vehicles. BCI Group 94R batteries are also known as H7, L4 and/or LN4 batteries.

They are often installed on vehicles manufactured by BMW, Mercedes, Audi, Volkswagen etc. As such, BCI Group 94R batteries are designed to be maintenance free batteries, to be able to provide strong starting current even in low temperature conditions, to accept charge quickly, to power broad range of onboard electronics, to endure automatic start-stop applications etc.

Updated: July 9, 2021.

Group 34 Batteries - Dimensions, Features and Recommendations

odyssey 34 pc1500t mGroup 34 batteries are medium-large, but still rather powerful batteries, featuring 20h capacity in the 50-75 Ah range, providing 750-900 CCA, 100-145 minutes of Reserve Capacity etc. Their weight depends on the chemistry, battery type, and internal construction and it ranges between 37 and 51 pounds (16.8 - 23.1 kg).

BCI group 34 batteries are commonly used in automotive, marine, industrial, and off-the-grid applications in the form of starting, dual-purpose and deep cycle batteries, offering good starting/cranking characteristics, a large number of charging/discharging cycles, and excellent deep cycle recovery - battery type-dependent, of course.

Updated: July 8, 2021.

Groups 51 and 51R Batteries - Dimensions, Features and Recommendations

group 51 batteries mBCI Groups 51 and 51R batteries are very popular automotive starting and dual-purpose batteries, and are often being used as general-purpose/auxiliary batteries in various applications requiring stable and reliable power sources.

Although Groups 51 and 51R batteries have their size defined, their size tends to vary a little bit - some manufacturers optimized their batteries for certain applications, and make them slightly smaller (easier fit) or even larger (better performances). So, before ordering a certain model, check the actual size of the battery and the size of your battery compartment.

Updated: May 14, 2021.

Group GC8 and Group GC8H - 8 Volt Golf Cart Batteries

trojan t 875 w150pxBCI Group GC8 and Group GC8H batteries are heavy-duty, deep cycle batteries, very similar to GC2 and GC2H batteries.

BCI Group GC8 and Group GC8H batteries are often used as deep cycle batteries in golf carts, but also in marine applications, off-the-grid applications, for powering medical and security systems, and similar.

Updated: May 10, 2021.

Group GC2 and Group GC2H - 6 Volt Golf Cart Batteries

gc2 battery mBCI Group GC2 and Group GC2H batteries are heavy-duty, deep cycle batteries commonly used in golf carts and other automotive applications. Also, they are often used as deep cycle batteries in marine applications, off-the-grid applications, for powering medical and security systems, and similar.

Although they are by definition 3-cell 6V batteries, GC2 and GC2H batteries are sometimes offered as 12V batteries (mostly lithium 4-cell batteries) for building 24V, 36V, and 48V battery packs with fewer batteries.

Published: May 10, 2021.

Group GC12 Batteries - 12 Volt Golf Cart Batteries

trojan t 1275 w150pxBCI Group GC12 batteries are deep cycle, heavy-duty batteries, intended for automotive, off-the-grid, and light industrial applications where strong and durable batteries are required as reliable sources of energy.

GC12 batteries are also known as 12V golf cart batteries, but they are also commonly used as trolling motor batteries, RV house batteries, power inverter batteries, in medical and security systems, etc.

Published: May 10, 2021.

Group 27 Batteries - Dimensions, Features, and Recommendations

vmaxtanks mr127 100 mGroup 27 batteries are rather large and powerful batteries, featuring 20h capacity in 66-110 Ah range, providing 600-1000 CCA, 140-220 minutes RC, etc. Their weight depends on the internal construction and it ranges between 54 and 70 pounds (24.5 - 32 kg).

Group 27 batteries' physical dimensions depend on the exact battery group because there are three different, although very similar battery groups: Group 27, Group 27F, and Group 27H, although they are often labeled as Group 27 Batteries.

Updated: April 29, 2021.

Group 78 Batteries - Dimensions, Features, and Recommendations

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BCI Group 78 batteries is a group of car and light trucks batteries but also used in marine and light industrial applications as starting and as general, dual-purpose batteries.

BCI Group 78 batteries are often used in 'Stop-and-Go' automotive applications, requiring the batteries to provide large currents very often and to be recharged quickly - such applications require tough and durable, high-quality batteries.

Updated: April 25, 2021.

Groups U1 and U1R Batteries - Dimensions, Features, and Recommendations

group u1 battery mBCI Groups U1 and U1R batteries are general purpose batteries often used in medical and security applications, in wheelchairs, electric scooters, golf carts, lawnmowers, and other garden tools, camping, etc.

BCI group U1 and U1R batteries are mostly AGM and Gel-Cell batteries with wet/flooded batteries being phased out. Also, lithium-ion U1 batteries are appearing on the market, offering higher capacity, a larger number of charging/discharging cycles, and lower weight, but they also cost more, at least initially.

Updated: March 29, 2021.

Group 75 Batteries - Dimensions, Features, and Recommendations

group 75 battery mBCI Group 75 batteries are automotive and light industry batteries, designed mostly as either starting or dual-purpose batteries with very good starting features.

As such, BCI Group 75 batteries are commonly used in cars, light trucks, and other vehicles where they are used for starting internal combustion engines, but also for powering various other loads like pumps, winches, lights, etc.

Published: September 25, 2020.

Group 48 (H6, L3, 66L3) Batteries - Dimensions, Features, and Recommendations

group 48 mGroup 48 (H6, L3, 66L3) batteries are mid-range batteries commonly used as automotive, marine, and light industrial batteries, as starting or dual-purpose batteries and for powering various electric and electronic devices while the main engine(s) are turned off or while the mains power is not present.

Most BCI Group 48 (H6, L3, 66L3) batteries are designed as maintenance-free, spill-proof AGM batteries with increased resistance to vibrations and mechanical shocks (when compared with the older wet/flooded lead-acid batteries).

Published: September 16, 2020.