Milwaukee WK18-XC50 M18 18V 5.0Ah XC Replacement Battery
- Direct replacement for the Milwaukee 48-11-1850 M18 RedLithium XC 5.0 battery.
- Designed for the Milwaukee M18 18V platform with 5.0Ah capacity and a 5S2P 18650 configuration.
- Verified BMS handshake on genuine Milwaukee chargers.
- Retail-ready packaging and batch documentation support international shipping and customs clearance in the EU, US, UK, AU, and JP markets.
This is a replacement battery for the Milwaukee M18 platform. The WK18-XC50 is the M18 18V 5.0Ah battery replacement (5S2P, 18650). It replaces the Milwaukee 48-11-1850 M18 RedLithium XC 5.0 battery. It has verified the BMS handshake on real Milwaukee chargers.
The WK18-XC50 is made by Dongguan Ruineng New Energy (Nuranu), a high-tech custom battery factory since 2012. The batteries are made on a fully automated assembly line. Every battery is tested at the end of the line. It is designed for original equipment manufacturers (OEM), hardware distributors, and private-label brands that need the same fit and performance as OEM products at factory-direct prices.
Compatible Host Tools
- Milwaukee M18 high-demand drills & grinders
- M18 RedLithium XC 5.0 tools
- 48-11-1850 compatible tools
Target Applications
- High-Demand M18 Tools: The 5.0Ah WK18-XC50 sustains long runtime for high-torque M18 grinders, rotary hammers, and saws.
- Production Fleets: A direct M18 XC 5.0 (48-11-1850) replacement that maximizes uptime on all-shift tool fleets.
- Private-Label Distributors: Sourced with your branding and carton-ready packaging as a Milwaukee M18 5.0Ah replacement battery.
Core Technical Advantages
1. Direct 48-11-1850 Replacement
Matched M18 latch geometry makes the WK18-XC50 a true drop-in for the Milwaukee 48-11-1850 M18 RedLithium XC 5.0 battery.
2. 5.0Ah 5S2P Architecture
A 5S2P string of high-capacity 18650 cells delivers a genuine 5.0Ah for high-demand tools.
3. Verified Charger Handshake
BMS handshakes correctly with genuine Milwaukee chargers; behaves identically to the OEM RedLithium XC 5.0 pack.
Technical Specifications
| Feature | Specification |
|---|---|
| Replacement Model | WK18-XC50 |
| Compatible Brand | Milwaukee (M18 RedLithium) |
| Nominal Voltage | 18V |
| Rated Capacity (real) | 5.0Ah |
| Cell Type | 18650 · 2500mAh |
| Configuration | 5S2P |
| Shell Color | Black + Red |
| Proprietary Mold | Yes (in-house) |
| Net Weight | Confirmed at order |
| Battery Dimensions | Confirmed at order |
| Inner Box | Confirmed at order |
| Master Carton | Confirmed at order |
| Qty per Carton | Confirmed at order |
| Carton Net / Gross | Confirmed at order |
Packaging & Wholesale Logistics
The WK18-XC50 is shipped in a box ready for retail, designed for distributors to resell and for shipping internationally. Every batch of products is shipped with UN38.3 transport test reports, IEC 62133 safety certificates, MSDSs, and CE Declaration of Conformity. This helps ensure that customs can easily clear the products in the EU, US, UK, AU, and JP markets.
| Item | Details |
|---|---|
| MOQ | 100 units (catalog) · 500 units (private label) |
| Lead Time | 25–35 days standard · 18–22 days expedited |
| Payment | 30% T/T deposit + 70% against B/L |
| Warranty | 12 months |
Product Video
Frequently Asked by Distributors:
Does the WK18-XC50 replace the Milwaukee M18 XC 5.0 (48-11-1850) battery?
Yes, the WK18-XC50 is a direct replacement for the Milwaukee 48-11-1850 M18 RedLithium XC 5.0 battery. It is a true 5.0Ah 18V pack. It’s a new battery option for your M18 5.0Ah battery that’s been used a lot. It comes with a full warranty and all the necessary documents.
What is the MOQ for the WK18-XC50 replacement battery?
The standard MOQ is 100 units for the WK18-XC50. You can get paid samples of 1–10 units to check the BMS-handshake before placing an order. Private-label or custom-spec runs start at 500 units.
Is the WK18-XC50 drop-in compatible with original Milwaukee M18 chargers?
Yes. The WK18-XC50 BMS has M18-specific software, so it works correctly with Milwaukee chargers. It also has the same fuel-gauge reporting, authentication, and safety lockouts as the OEM RedLithium pack. Handshake is validated on 100% of units at the end of the line.
Are these Milwaukee M18 replacement batteries any good?
Yes. Our WK18-XC50 uses high-quality cells from leading brands like Samsung, LG, Panasonic, and BAK. These cells are matched in capacity and resistance, and their performance is validated by a battery management system (BMS) for compatibility with genuine Milwaukee chargers. It is made as a professional-grade Milwaukee M18 replacement battery, not a low-cost copy, and is backed by a 12-month warranty.
Will Milwaukee or Home Depot replace my battery — and how is your WK18-XC50 different?
Milwaukee’s warranty covers genuine packs through their service channels. We are an independent factory that supplies new WK18-XC50 replacement packs for the M18 platform. These packs are a direct, lower-cost alternative when a pack is out of warranty or you need a large supply. They have full UN38.3 / IEC 62133 / CE documentation.
Do you replace the cells in my old Milwaukee battery?
We supply complete, ready-to-use WK18-XC50 replacement packs — we don’t offer cell replacement or rebuild services. A new pack with fresh Grade-A cells and a fresh BMS is far more reliable than replacing the cells in an old M18 battery, and it comes with full safety documents.
How do I install the WK18-XC50 M18 replacement battery?
It installs just like a real Milwaukee M18 pack. All you have to do is slide it onto the tool until it latches, and then charge it on any real Milwaukee M18 charger. You don’t need to change it or buy an adapter.
What cells and configuration does the WK18-XC50 use?
The WK18-XC50 uses high-quality 18650 cells (2500mAh each) arranged in a 5S2P configuration for a nominal 18V and a true rated capacity of 5.0Ah. Before assembly, cells are matched based on their capacity (±20 mAh) and internal resistance (±5 mΩ). You can specify your preferred cell brand (Samsung, LG, Panasonic, or BAK) when you place your order.
What is the warranty on the WK18-XC50?
All WK18-XC50 replacement packs come with a 12-month warranty against manufacturing defects. Every batch of products is shipped with the following documents:
– UN38.3 test report
– IEC 62133 certificate
– MSDS
– CE Declaration of Conformity
These documents are needed to clear customs worldwide.