DINWEY 145G51 (N150) Heavy-Duty Truck Battery
Model 145G51 · JIS Group N150 · 12V · 135 Ah · 900 A CCA
DINWEY 145G51 (JIS N150) heavy-duty starting battery — 12V, 135Ah, 900A CCA, 220min RC, 508×222×212mm. For large trucks, buses and diesel generators in JIS markets. IATF 16949 certified.
Key Takeaways
- The 145G51 is DINWEY's standard heavy-truck JIS battery — 135Ah capacity and 900A CCA for large diesel engines in temperate and warm climates.
- A 508×222×212mm footprint fits the most common JIS heavy-truck tray — confirm your tray before ordering.
- The Pb-Sb (lead-antimony) thick plate survives deep cycling and vibration better than a thin automotive plate, but it is serviceable — keep an eye on electrolyte levels.
- 220 minutes of reserve capacity is your buffer for lights, telematics and a failed alternator.
- In a 24V truck, the 145G51 pairs with a second identical unit in series — replace both together.
The DINWEY 145G51 is the JIS N150-class battery — the workhorse starting battery for large trucks, buses and diesel generators across Asia, the Middle East and Africa. The 'N150' group designation is a JIS size class; the 145G51 is DINWEY's specific model code within that class.
It is built on a heavy-duty thick-plate flooded design with a lead-antimony (Pb-Sb) grid. This is a deliberate engineering choice over the thinner calcium-alloy plates used in passenger cars — antimony tolerates the deep cycling, high current draw and constant vibration of large diesel engines, at the cost of requiring occasional water top-up (a serviceable design, not a defect).
Manufactured by Chengguang Energy under an IATF 16949 automotive quality system, every shipped 145G51 batch includes CCA test data and full documentation.
Technical Specification
| Specification | Value |
|---|---|
| DINWEY Model | 145G51 |
| Group | N150 |
| Standard | JIS |
| Voltage | 12V |
| Capacity (C20) | 135 Ah |
| Cold Cranking Amps (CCA) | 900 A |
| Test Standard | SAE J537 |
| Reserve Capacity (RC) | 220 min |
| Dimensions (L×W×H) | 508×222×212 mm |
| Terminals | JIS type A (large taper post) |
| Technology | Heavy-duty thick-plate flooded (Pb-Sb grid) |
Specifications are representative for this model. Exact CCA, capacity and dimensions are confirmed per batch on the certificate of analysis — contact us for a full datasheet.
Understanding This Model's Specifications
Cold Cranking Amps (CCA) is measured to SAE J537 — the current the 145G51 can deliver for 30 seconds at −18°C while holding at least 7.2V. Its 900A rating means a strong, dependable cold start for a large diesel engine in normal climates.
Reserve Capacity (RC), also to SAE J537, is 220 minutes — the time a fully charged battery sustains a 25-amp load at 27°C before dropping to 10.5V. This is your engine-off buffer for lights, telematics and other loads.
Capacity is measured at the 20-hour rate (C20): 135Ah describes total stored energy over a slow 20-hour discharge. This is a different measure from the short, high-current CCA burst.
Dimensions of 508×222×212mm (L×W×H) are the standard JIS N150 footprint. Always confirm tray length, width, height and terminal position before replacing or upgrading.
Typical Applications
- Large trucks and semi trailers in JIS markets
- Buses and coaches
- Standby and prime diesel generators
- Off-highway and construction equipment
Vehicle Fitment
This model is a JIS N150-class heavy-duty starting battery. Whether it fits a specific vehicle depends on the vehicle's battery standard, group size, terminal type, polarity and tray dimensions — which vary by model and generation. Always confirm the exact configuration in your vehicle manual before replacement.
Frequently Asked Questions
What does 145G51 mean?
145G51 is the JIS model code. The 'N150' is the group-size class. 145G51 belongs to the N150 class — a heavy-duty JIS battery for large trucks, buses and generators.
How much CCA does the 145G51 have?
900A CCA, measured to SAE J537 (30 seconds at −18°C). This delivers a strong cold start for a large diesel engine in normal climates.
What are the dimensions of the 145G51?
508×222×212mm (length × width × height), the standard JIS N150 footprint. Confirm your tray matches before ordering.
Is the 145G51 maintenance-free?
No — it is a serviceable flooded battery with a lead-antimony grid. It needs periodic electrolyte level checks and distilled-water top-ups, which is a deliberate trade-off for better deep-cycling and vibration resistance.
Can the 145G51 be used in a 24V truck?
Yes — a 24V system uses two 12V batteries in series. Use two identical 145G51 units and replace both together to keep charging balanced.
Compare With Other Models
Related Technical Documentation
- JIS N150 vs N200 — Which Heavy-Duty Truck Battery?
- What Is CCA & How Much Does a Diesel Truck Need?
- 12V vs 24V Truck Electrical Systems
From the DINWEY Knowledge Hub.