JIS Battery Standard

JIS (Japanese Industrial Standard) is the dominant automotive battery specification across Asia, Africa, the Middle East, and Oceania.

How JIS Battery Codes Work

JIS battery model numbers encode physical dimensions and performance class:

Example: 65D26

65 = Performance class (higher = more capacity/CCA)
D  = Width/depth class (D = wide, B = narrow)
26 = Length in cm (26 cm)

Format	Example	Meaning
`NN L NN`	65D26	Performance + Width class + Length
`NNN L NN`	105D31	3-digit performance for larger batteries
`NNN L NN`	145G51	G-class for heavy-duty batteries

JIS batteries use the T1 terminal type with two sizes:

Terminal	Post Diameter	Used On
T1 (small)	~14.7 mm (+) / ~13.0 mm (-)	Standard SLI batteries
T1 (large)	~19.5 mm (+) / ~17.9 mm (-)	Heavy-duty batteries

JIS batteries use B00 (top frame) hold-down — a metal frame that clamps across the top of the battery.

JIS standard polarity is [0] (right-positive): - Left terminal: Negative (-) - Right terminal: Positive (+)

When viewed from the terminal side with terminals closest to you.

Model	Type	Capacity	CCA
55B24	SLI	45 Ah	370 A
55D23	SLI	60 Ah	500 A
65D26	SLI	55–70 Ah	450–580 A
95E41	SLI	100 Ah	750 A
105D31	SLI	90 Ah	650 A
145G51	Heavy Duty	120–135 Ah	800–900 A
190H52	Heavy Duty	200 Ah	1,100 A