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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £7.99 | 3 to 5 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £7.99 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £7.99 | 7 to 10 working days |
Heavy commercial vehicles place exceptional demands on starting batteries, requiring sustained cranking power across a wide range of operating temperatures and load cycles. The Numax 638 Premium Commercial Vehicle Battery is engineered to meet those demands, offering a dependable starting solution for trucks, coaches, agricultural machinery, and other heavy-duty applications.
Built to the Numax Premium Commercial specification, this battery delivers 900A Cold Cranking Amps (EN) from a 143Ah (C20) capacity, housed within a robust MAC132 case. Numax batteries are manufactured to high specification tolerances to handle the elevated electrical demands of modern commercial vehicle systems, including advanced charging circuits and auxiliary loads. The 638 operates at 12V.
The 638 measures 510mm × 174mm – 205mm (L × W × H) and weighs 33.8kg. It features a Type 1 terminal arrangement with standard 0 polarity (positive right) and B00 hold-down configuration. The cross-reference for this battery is 638, with comparable products including the YBX1638 in the Yuasa range. Start-stop compatibility is not confirmed – refer to the product label before fitment.
This battery is available as part of a broader Numax Premium CV range. Variants within the same family include the S629, 612, 620, 622, 623, 624, 625, 629, 629UR, and 632.
The Numax 638 is supplied with a 2-year warranty, covering manufacturing defects under normal service conditions.
Delivery: pallet shipment, typically 3–5 working days within UK mainland. Contact PartsForMachines for delivery quote. 30-day returns.
Quality, durability and performance sum up the NUMAX range of batteries. NUMAX batteries are built to the very highest specification to cope with today’s automotive electrical demands. The NUMAX automotive range has a battery to suit every application whilst providing premium quality and value. That’s why people trust the NUMAX battery brand to give them the performance they need no matter how harsh the conditions.
Key Feature:Developed by Numax as a 12.0 1 battery, offering stable energy output, dependable starting power, and compatibility across general automotive and light commercial applications.
Uses:PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specialising in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalogue of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
Fitment Warning:You must check your current battery against the specifications of this battery before ordering to ensure that this is the correct battery for your vehicle. Check battery technology, dimensions, terminal type, polarity, capacity (AH) and cranking performance (CCA). We cannot guarantee correct fitment under any circumstances.
| Brand | Numax Batteries |
|---|---|
| Voltage | 12V |
| Capacity AH (C20) | 143Ah |
| Cold Cranking Amps (EN) | 900A |
| L × W × H | 510mm × 174mm × 205mm |
| Warranty period | 2 Years |
| Weight (Kg) | 33.8 |
| Capacity AH (C5) | |
| Capacity AH (C10) | |
| Capacity AH (C100) | |
| Marine Cranking Amps (MCA) | |
| Watt-Hours (WH) | |
| Length (mm) | 510 |
| Width (mm) | 174 |
| Height Inc. Terminal (mm) | 205 |
| Terminal Placement | 0 |
| Terminal Type | 1 |
| Hold Down | B00 |
| Case Size | MAC132 |
| ETN Number | |
| TTNR |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Expert Guidelines for Preserving Your Heavy Equipment Battery Heavy machinery, including forklifts, bulldozers, and excavators, relies on robust batteries to minimize downtime and maximize operational availability. These batteries must endure even more challenging conditions than typical automotive batteries. Moreover,...
Standard Delivery: £7.99
Delivery Estimate: 3 to 5 working days
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| Technical Specification | ||||
|---|---|---|---|---|
| PRODUCT NUMBER | YBX1612 | YBX1630 | YBX1655 | YBX1657 |
| Voltage | 12 | 12 | 12 | 12 |
| Capacity (AH) | 143 | 143 | 126 | 142 |
| Hold Down | N | B3 | N | N |
| Cold Cranking Amps (EN1) | 900 | 900 | 750 | 850 |
| Terminal Type | T1 | T1 | T1 | T1 |
| Cell Layout | 3 | 3 | 0 | 0 |
| Length | 513 | 513 | 347 | 345 |
| Width | 189 | 189 | 174 | 175 |
| Height | 223 | 223 | 285 | 275 |
| Show More | ||||
A. The Numax 638 has a Cold Cranking Amps (EN) rating of 900A, making it suitable for heavy commercial vehicle starting applications in cold and demanding conditions.
A. The Numax 638 has a rated capacity of 143Ah measured at the C20 rate. This reflects the total energy available for sustained electrical loads as well as engine starting.
A. The battery measures 510mm in length, 174mm in width, and 205mm in height including the terminal. It weighs 33.8kg. Always verify these dimensions against your vehicle battery tray before ordering.
A. The Numax 638 features a Type 1 terminal arrangement with standard polarity 0, meaning the positive terminal is positioned on the right-hand side when viewing the battery from the front.
A. The Numax 638 uses a B00 hold-down configuration. Confirm that your vehicle's battery tray and clamp arrangement is compatible with this specification before fitting.
A. Start-stop compatibility for the Numax 638 has not been confirmed. Please refer to the product label and your vehicle manufacturer's specification before fitting this battery in a start-stop application.
A. The Numax 638 is housed in a MAC132 case. This case designation refers to the physical form factor and can be used to cross-reference fitment compatibility with your vehicle's battery compartment.
A. The Numax 638 is referenced directly by the part number 638. A comparable product in the Yuasa range is the YBX1638. Always verify fitment using dimensions, terminal type, and voltage before substituting batteries.
A. The Numax 638 is supplied with a 2-year manufacturer's warranty covering defects in materials and workmanship under normal operating conditions. Warranty claims should be raised through PartsForMachines.
A. The Numax 638 is dispatched via pallet shipment due to its size and weight of 33.8kg. Delivery to UK mainland addresses typically takes 3–5 working days. Contact PartsForMachines directly for a delivery quote before placing your order. A 30-day returns policy applies.
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