H6 vs H7 Battery: Group 48 and 94R

H6 is commonly mapped to Group 48 and H7 to Group 94R. The two group designations are not universal vehicle-fitment approvals.

Compare case and terminals

Check the BCI envelope and actual product dimensions, polarity and hold-down. Aliases can differ by manufacturer or region.

Check technology and registration

An AGM H7 cannot replace a flooded H6 merely because a retailer suggests a size upgrade. Use current OEM service guidance.

Published group envelopes

BCI maximum dimensions, not product measurements
Group	Length mm	Width mm	Height mm
Group 48	278	175	190
Group 94R	315	175	190

Put the answer to work

Start with the actual vehicle label or installed component. Then use our vehicle directory and comparison tools to narrow the research. Any missing condition should be checked with the manufacturer or a qualified installer.

Official and manufacturer references

https://www.interstatebatteries.com/en-lx/agm-batteries