Battery Equivalents and Replacements

H6 vs H7 Battery

H6 and H7 are battery labels (battery codes) according to the DIN standard and are rarely used in the US - more commonly in Europe.

H6 and H7 batteries feature similar dimensions but not quite the same, leading to different performances.

DIN (German Industrial Standard) Part Number system is (being) replaced by the ETN (European Type Number) consisting of 6 or 9 numbers. However, DIN codes H6 and H7 are still being used quite often.

Updated: November 27, 2023.

optima ds6 w300px

H6 and H7 Battery Dimensions

According to the DIN part number system, H6, and H7 battery dimensions are (L x W x H):

  • H6 battery: 278 x 175 x 190 mm,
  • H7 battery: 315 x 175 x 190 mm.

As one can see, H6 and H7 batteries feature exactly the same width (175 mm, 6.89 inches) and height (190 mm, 7.48 inches), but they differ in length by 37 mm (1.47 inches) - H7 batteries are longer, and thus feature larger volume and hence better performances in terms of capacity, cranking Amps, and Reserve Capacity (RC). Also, H7 batteries tend to be heavier.

H6 and H7 batteries have several equivalent sizes according to the BCI standard:

  • H6 battery (278 x 175 x 190 mm) → BCI Group 48 (11 x 6 7/8 x 7 9/16 inches, 278 x 175 x 192 mm) and BCI Group 98R (11 1/8 x 6 7/8 x 7 1/2 inches, 283 x 175 x 190 mm),
  • H7 battery (315 x 175 x 190 mm) → BCI Group 94R (12 7/16 x 6 7/8 x 7 1/2 inches, 315 x 175 x 190 mm).

As one can see, H7 and BCI Group 94R batteries have practically exactly the same dimensions (12 7/16 x 6 7/8 x 7 1/2 inches, 315 x 175 x 190 mm) and can be used interchangeably.

Similarly, H6 and Group 48 batteries share practically the same physical dimensions.

acdelco 48agm w300px

H6, H7, group 48, and group 94R batteries are commonly used in automotive and light industrial applications as starting/cranking and dual-purpose batteries.

Most modern H6, H7, group 48, and group 94R batteries are sealed lead-acid (SLA) Absorbent Glass Mat (AGM) batteries that have very good starting performances (strong Cold Cranking Amps (CCA)), but thanks to advancements in technology, they also cycle very well and tolerate relatively well deep discharges.

The following comparison chart lists some of the most popular group 48/H6 batteries with their most important features and specifications.

Model Battery Type
Cell Type
Capacity (Ah)
RC (Min)
CCA
MCA
Weight (lbs/kg)
Review
ACDelco 48AGM Professional Starting
AGM
70
120
760
-
45.5 lbs; 20.6 kg
-
Deka 9A48 Intimidator Dual Purpose
AGM
70
120
760
875
45 lbs; 20.4 kg
-
Delphi BU9048 MaxStart Starting
AGM
70
120
760
-
45.5 lbs; 20.6 kg
-
Interstate MTX-48/H6 AGM Starting
AGM
70
-
760
-
45.4 lbs; 20.6 kg
-
MARXON Group 48 H6 L3 Starting
AGM
70
120
760
-
46.53 lbs; 21.1 kg
-
NorthStar NSB-AGM48 Dual Purpose
AGM
69
135
775
880
48 lbs; 21.8 kg
-
Odyssey Battery 48-720 Battery Dual Purpose
AGM
69
130
723
842
48 lbs; 21.8 kg
-
Optima Batteries DH6 YellowTop Dual Purpose
AGM
72
140
800
928
54 lbs; 24.5 kg
Review
UPLUS Group 48 Battery Starting
AGM
70
120
760
-
46.53 lbs; 21.1 kg
-
Weize Group 48 Battery Dual Purpose
AGM
70
120
760
-
47.5 lbs; 21.5 kg
-
XS Power D4800 Dual Purpose
AGM
60
120
-
815
47.6 lbs; 21.6 kg
-

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

On average, BCI Group 48 batteries feature a nominal capacity of 60 to 72Ah, CCA rating of 720-800 Amps, MCA rating of 800-930 Amps, RC value of 120-140 minutes, and they weigh 45 - 54 pounds (20 - 24 kg).

The following comparison chart lists some of the most popular group 94R/H7 batteries with their most important features and specifications.

Model Battery Type
Cell Type
Capacity (Ah)
RC (min)
CCA
MCA
Weight (lbs/kg)
Review
ACDelco 94RAGM Dual Purpose
AGM
80
140
850
-
51.6 lbs; 23.4 kg
-
Deka 9A94R Dual Purpose
AGM
80
140
800
-
51.5 lbs; 23.3 kg
-
Delphi BU9094R Dual Purpose
AGM
80
140
800
-
52 lbs; 23.6 kg
-
Exide Edge FP-AGML4/94R Dual Purpose
AGM
80
140
800
-
53.3 lbs; 24.1 kg
-
Interstate MTX-94R/H7 Starting
AGM
80
140
850
1000
52 lbs; 23.6 kg
-
NorthStar NSB-AGM94R Dual Purpose
AGM
76
158
840
1030
57 lbs; 25.8 kg
-
Odyssey 94R-850 Dual Purpose
AGM
80
150
850
-
54.8 lbs; 24.9 kg
-
Optima DH7 YellowTop Dual Purpose
AGM
80
155
880
-
60.5 lbs; 27.4 kg
-
XingCell GH7 Dual Purpose
Lithium
75
180
880
-
17.8 lbs; 8.06 kg
-
XingCell PH7 Dual Purpose
Lithium
54
~130
610
-
15.4 lbs; ~7 kg
-

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

On average, Group 94R batteries feature a nominal capacity of 76 to 80 Ah, CCA rating of 800-850 Amps, RC value of 140-160 minutes, and they weigh 51 - 57 pounds (23 - 26 kg).

Difference Between H6 and H7 Batteries

Thus, main differences between H6 and H7 batteries are:

  • physical dimensions: H6 battery physical dimensions are 278 x 175 x 190 mm, and H7 battery physical dimensions are 315 x 175 x 190 mm,
  • capacity: H6 capacity ~60-72Ah, H7 capacity ~76-80Ah,
  • CCA ratings: H6 CCA 720-800 Amps, H7 CCA 800-850 Amps,
  • RC values: H6 120-140 minutes, H7 140-160 minutes,
  • weight: H6 45-50 pounds, H7 51-57 pounds.

Note that some brands offer lithium H6 and H7 batteries which are much lighter, but these batteries are far from being common.

deka intimidator 94r w300px

Can I Use an H7 Battery instead of an H6 Battery?

If your battery compartment can accept a slightly longer H7 battery, and you choose the battery with the same or better capacity, CCA, RC, Stop&Go (Stop/Start), etc. performances, then yes, you can choose H7 battery instead of H6 battery.

If you plan to replace the AGM battery with a lithium battery, consult the battery manufacturer AND certified car dealership, just in case - better safe than sorry.

Personally, weight savings in a typical passenger car are minimal when taking into account total passenger car weight. And just one glitch in the car's electrical system also means a disconnected lithium battery, in the best-case scenario. Call me paranoid, but ...


Long Story Short: When replacing not only H6/H7 batteries, but car batteries in general, always check actual size, terminal type and orientation, battery type and chemistry, and its capacity and starting performances.

H7 batteries may be replaced by group 94R batteries, but H6 batteries should not be replaced by group 48 batteries, unless the group 48 battery may fit into the required battery compartment.

Also, the H7 battery may be replaced by the H6 battery regarding their size, but the H6 battery is "weaker" than the H7 battery and will work harder (if at all!) and will not last as long as the H7 battery.

On the other hand, if the H7 battery may fit the H6 battery compartment and the charging system may recharge it properly, it will work well and will hopefully last at least as long as the H6 battery.

Note: all these batteries store plenty of energy and can release large currents easily. So stay safe - whatever You do with these batteries, it is your own responsibility...