“H7” on a battery label isn’t a brand or a chemistry; it’s a standardized size. What an H7 battery actually is, in practical terms, is a 12-volt starter battery built to the DIN/EN H7 footprint — the size North America catalogs as BCI Group 94R and many retail shelves label “94R/H7.” Automakers spec it into European and Asian sedans, SUVs, and light trucks whose electrical loads outgrow basic group sizes. The specs and fitment checks below tell you whether an H7 belongs in your car.
H7 Battery Specs: Size, Capacity, and Starting Power
Ratings vary by brand and chemistry, as the table shows.
| Spec | Typical H7 Value | What It Means |
|---|---|---|
| Physical size | 12.44 x 6.93 x 7.5 in (315 x 175 x 190 mm) | Length is what separates H7 from the shorter H6/Group 48 |
| Voltage | 12 V | Standard passenger-car electrical system |
| Capacity | About 80 Ah | Lithium H7 variants are also sold at 40 and 60 Ah |
| Cold cranking amps | 730–880 CCA | Flooded and AGM ratings; some lithium models advertise 1,000 A |
| Reserve capacity | 130–155 minutes | How long it can carry essential loads if the alternator fails |
| Weight | About 45–54 lb | Flooded and AGM versions; lithium cuts this sharply |
| Chemistry | Flooded, AGM, lithium | Most modern H7 fitments specify AGM |
Cold cranking amps (CCA) measure starting power at 0°F — the number that decides whether a cold morning starts cleanly.
Is an H7 Battery the Same as a Group 94R?
Yes. H7 is the DIN/EN name, BCI Group 94R is the North American name, and L4 appears in European catalogs — all three can describe the same physical battery. Retailers merge the systems on a single label all the time, so “H7-AGM,” “94R/H7,” and “L4/H7/94R-P” may point to identical hardware.
The practical takeaway: find an H7 or 94R with dimensions near 315 x 175 x 190 mm, and you’re looking at the same group size whether the catalog was written in Detroit or Dortmund.
Fitment Checks: Terminals, Chemistry, and the H6 Mistake
An H7 battery only fits correctly when four things line up: dimensions, terminal layout, chemistry, and the vehicle maker’s specification. Size is the start, not the whole story.
Terminal position matters — many H7 listings place the positive terminal top-right-front and the negative terminal top-left-front, and cables that reach from the other side won’t connect cleanly. Chemistry matters more: AGM, flooded, and lithium versions behave differently, charging systems tuned for one type can damage another, and start-stop vehicles commonly require AGM. Follow the owner’s manual, not the cheapest listing.
The classic mistake is grabbing an H6 (Group 48). It shares the width and height but runs shorter, so it can rock in the tray or misalign the hold-down clamp. Read the printed part number on the old battery, or measure the tray, before ordering.
If your vehicle calls for AGM, our roundup of the best AGM H7 batteries compares the leading models side by side.
- Confirm the size against the current battery’s label: H7, 94R, or L4.
- Mirror the terminal orientation to your cable routing.
- Choose the chemistry your vehicle spec requires.
FAQs
How Long Does an H7 Battery Last?
Extreme heat, frequent short trips, and heavy accessory loads all shorten that span. Have the charging system tested at the same time as the battery, because an overcharging alternator kills any battery early regardless of chemistry.
Can I Replace an H6 (Group 48) Battery With an H7?
Only if the vehicle maker approves both sizes. The H6 is shorter than the H7, so the longer battery may not seat properly in the tray or line up with the hold-down clamp and cables, even though both run at 12 volts. When in doubt, replace with the exact group size printed on the old battery’s label.
What Do Ah and CCA Mean on an H7 Battery?
Ah (amp-hours) measures capacity — roughly how long the battery can deliver current — and mainstream H7s carry about 80 Ah. CCA (cold cranking amps) measures starting power at 0°F, with higher numbers making cold-weather starts more reliable.
References & Sources
- Interstate Batteries. “M-94R/H7 Product Page.” Confirms the H7/Group 94R dual naming and fitment details.
- Milbatteries. “H7 Battery Specification.” Spec sheet covering H7 dimensions and electrical ratings.
- Exide / Autoecat. “Exide H7/L4/94R Specification Sheet.” Documents the H7/L4/94R labeling used across regional systems.