BatteriesVerified Sep 28, 2026
12V battery
38B19L-MF, 28Ah (5-hour rate)Confirm the installed battery and terminal orientation before replacement.
Honda Motor Co. source ↗Exact-code service & fitment
Honda Grace GM4: 12V battery, starting & electrical fitment
Separate the low-voltage starting/auxiliary battery from key-fob cells and high-voltage hybrid battery hardware.
1verified facts
2fitment references
1service references
0step-by-step guides
Before you buy or service: Battery specification can vary by grade, equipment, terminal layout and production period. Do not infer fitment from another chassis code or from physical size alone.
Exact answers
1 source-backedSpecifications & capacities
Purchase-adjacent reference
2 exact referencesParts & fitment
Hybrid systemVerified Oct 2, 2026
Hybrid traction-battery architecture
Lithium-ion · 48 cellsHigh-voltage traction battery; not the auxiliary 12V battery.
Honda Motor Co., Ltd. source ↗Manufacturer-backed service
1 documentedMaintenance & repair references
electricalCondition based
12V battery service reference
Use the documented 38B19L-MF, 28Ah (5-hour rate) auxiliary-battery specification when checking replacement fitment.
Auxiliary 12V battery only; separate from the hybrid traction battery.
Honda Japan Grace Hybrid owner manual ↗Keep the exact code
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