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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 |
Compact motorcycle batteries must deliver reliable cold-start performance despite limited physical size a challenge that makes component quality critical. The Numax YB4LB is a 12V 4Ah conventional motorcycle battery supplied complete with an acid pack, ready for activation and installation on a wide range of small-capacity two-wheelers.
Manufactured under the Numax Standard range, the YB4LB is engineered to deliver consistent cold cranking performance rated at 50 CCA (EN), providing adequate starting energy for small-displacement motorcycles, scooters, and ATVs under everyday operating conditions. Each unit is supplied either with an acid pack or factory sealed, as noted on the product label." The battery measures 120mm (L) 70mm (W) 92mm (H inc. terminal) and weighs 1.59kg. It features a Terminal 2 configuration with standard polarity (code 0) and a B00 hold-down specification. The YB4LB directly replaces the cross-reference code YB4L-B and is compatible with similar units including EB4L-B and LYB4LB. Suitability for start-stop systems is not confirmed refer to the product label before installation. "The YB4LB is available alongside a broad range of Numax motorcycle batteries in this series, including the YB10LA2, YB12AA, YB14B2, YB16B, and Y50N18LA2, covering an extensive selection of fitment sizes across the motorcycle parc." This battery is backed by a 1-year warranty covering defects in materials and workmanship under normal use conditions. "Delivery: contact PartsForMachines for availability and shipping options. 30-day returns.
NUMAX motorcycle batteries offer great performance at a budget price. The range is vast covering almost every size of bike battery ever made. Each NUMAX motorcycle battery comes complete, either with an acid pack or factory sealed.
Key Feature:optimised for motorcycles and two-wheelers, ensuring consistent ignition power, rapid recharge capability, and stable energy supply for compact high-performance engines and accessory systems.
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) | 4Ah |
| Cold Cranking Amps (EN) | 50A |
| L × W × H | 120mm × 70mm × 92mm |
| Warranty period | 1 Year |
| Weight (Kg) | 1.59 |
| Capacity AH (C5) | |
| Capacity AH (C10) | |
| Capacity AH (C100) | |
| Marine Cranking Amps (MCA) | |
| Watt-Hours (WH) | |
| Length (mm) | 120 |
| Width (mm) | 70 |
| Height Inc. Terminal (mm) | 92 |
| Terminal Placement | 0 |
| Terminal Type | 2 |
| Hold Down | B00 |
| Case Size | |
| 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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A. The Numax YB4LB is a 12V battery with a capacity of 4Ah (C20 rating) and a cold cranking amp (CCA EN) rating of 50A, making it suitable for small-displacement motorcycles and scooters.
A. Yes. The Numax YB4LB is supplied complete with an acid pack for conventional activation. Some units in the Numax motorcycle range are factory sealed refer to the product label for confirmation of the specific unit supplied.
A. The YB4LB measures 120mm (length) 70mm (width) 92mm (height including terminal) and weighs 1.59kg.
A. The YB4LB uses a Terminal 2 configuration with standard polarity (polarity code 0) and a B00 hold-down specification.
A. The YB4LB directly replaces the YB4L-B. Compatible cross-reference alternatives listed on PartsForMachines include EB4L-B (PID000138051), LYB4LB (PID000138314), and 504011005 (PID000138567). Always verify dimensions and terminal layout before fitting.
A. Suitability for start-stop applications has not been confirmed for this battery. Refer to the product label and your vehicle manufacturer's specification before installation in a start-stop system.
A. IP rating, Marine Cranking Amps (MCA), and Watt-Hour (WH) data are not applicable or have not been specified for the YB4LB. For technical queries, contact PartsForMachines directly.
A. The YB4LB is backed by a 1-year manufacturer's warranty covering defects in materials and workmanship under normal operating conditions.
A. Yes. The Numax motorcycle battery range is extensive. Related SKUs available on PartsForMachines include the YB10LA2, YB12AA, YB14B2, YB16B, YB16ALA2, and Y50N18LA2, among others, covering a wide variety of motorcycle fitments.
A. The YB4LB is classified as unsuitable for standard carriage due to its battery chemistry. Delivery options and availability should be confirmed directly with PartsForMachines prior to ordering. A 30-day returns policy applies.
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