Written by DINWEY Technical Team · Published 2026-08-30

Truck Battery Terminal Types & Group Size Orientation¶

Q: What are the different truck battery terminal types?

JIS batteries use type A (large post) or type D (small post). European DIN batteries use the conical T1 terminal (19.5mm positive, 17.9mm negative). BCI batteries use SAE posts.

Q: What does left positive vs right positive mean?

It refers to which side the positive terminal is on when viewing the battery from the front. JIS batteries are typically right-positive; DIN batteries are typically left-positive.

Q: How do I know my battery's terminal orientation?

Check the existing battery's terminal positions or your vehicle manual. Installing a battery with the wrong orientation can stress cables and cause short circuits.

Q: What is a B13 hold-down?

B13 is the DIN bottom-bracket hold-down system, where the battery base has a lip gripped by the vehicle tray clamp. JIS batteries typically use a B0 top-frame clamp.

Q: Can I change a battery's terminal orientation?

No — orientation is fixed by the battery's internal layout. Always order the correct left-positive or right-positive configuration; using the wrong one can cause reversed-polarity damage.

TL;DR — Terminals and orientation matter as much as size. JIS batteries use type A/D posts (typically right-positive); DIN batteries use the conical T1 terminal (typically left-positive). Match the terminal type and orientation to your cables.

Terminal Types¶

Code	Description	Positive Ø	Negative Ø	Used in
A	JIS standard large post	14.7 mm	13.0 mm	JIS N50–N200
D	JIS standard small post	12.5 mm	11.0 mm	JIS N40–N50
A (Euro)	European conical (T1)	19.5 mm	17.9 mm	DIN batteries

Positive Terminal Position¶

Code	Positive position	Common in
0 / R	Right-hand side	JIS batteries (Japanese vehicles)
1 / L	Left-hand side	DIN batteries (European vehicles)

Hold-Down Systems¶

System	Type	Used in
B0	Top frame clamp	JIS batteries
B13	Bottom bracket	DIN batteries

The B13 bottom bracket is standard on European vehicles; the B0 top-frame clamp is standard on JIS vehicles.

Why Orientation Matters¶

Installing a battery with the wrong terminal orientation can:

Stress or damage the battery cables
Create a short-circuit risk if terminals contact metal
Prevent the hold-down from securing the battery properly

Always match the terminal type and left/right positive orientation to your existing battery and vehicle.

References¶

Automotive battery — Wikipedia

Find the Right Battery¶

Need a specific model or datasheet? Browse the DINWEY product range (JIS heavy-duty batteries) or contact us for a quote.

Specifications sourced from Chengguang Energy technical documentation under an IATF 16949 quality management system. CCA/Ah/RC values are per-model and verified against manufacturer data sheets — always confirm against your vehicle manual. Questions? Contact DINWEY.

DINWEY OEM Factory — Truck & Heavy-Duty Starting Batteries This guide is published by DINWEY, the truck-battery brand of Chengguang Energy (founded 2002). Browse the full product range, request a datasheet, or discuss OEM / private-label programs.