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Power Tool 18V · 5.0Ah
Milwaukee WK18-XC50 18V 5.0Ah
Milwaukee M18 RedLithium XC 5.0 Replacement

Milwaukee WK18-XC50 M18 18V 5.0Ah XC Replacement Battery

Drop-in replacement battery for the Milwaukee M18 platform. The WK18-XC50 is the M18 18V 5.0Ah battery replacement (5S2P, 18650) — a direct replacement for the Milwaukee 48-11-1850 M18 RedLithium XC 5.0 battery, with verified BMS handshake on genuine Milwaukee chargers.

Voltage18V
Capacity5.0Ah
Cell Type18650 cells
Configuration5S2P
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Overview

Drop-in replacement battery for the Milwaukee M18 platform. The WK18-XC50 is the M18 18V 5.0Ah battery replacement (5S2P, 18650) — a direct replacement for the Milwaukee 48-11-1850 M18 RedLithium XC 5.0 battery, with verified BMS handshake on genuine Milwaukee chargers.

Manufactured by Dongguan Ruineng New Energy (Nuranu) — a high-tech custom battery factory since 2012 — the WK18-XC50 is produced under a fully automated assembly line with 100% aging and end-of-line testing. It is engineered for OEM clients, hardware distributors, and private-label brands that need OEM-equivalent fit and performance at factory-direct pricing.

Milwaukee WK18-XC50 18V 5.0Ah view 1Milwaukee WK18-XC50 18V 5.0Ah view 2Milwaukee WK18-XC50 18V 5.0Ah view 3Milwaukee WK18-XC50 18V 5.0Ah view 4

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.

Product Video

Factory assembly line, BMS testing, and WK18-XC50 demonstration footage. Contact sales for additional product videos.

Technical Specifications

FeatureSpecification
Replacement ModelWK18-XC50
Compatible BrandMilwaukee (M18 RedLithium)
Nominal Voltage18V
Rated Capacity (real)5.0Ah
Cell Type18650 · 2500mAh
Configuration5S2P
Shell ColorBlack + Red
Proprietary MoldYes (in-house)
Net WeightConfirmed at order
Battery DimensionsConfirmed at order
Inner BoxConfirmed at order
Master CartonConfirmed at order
Qty per CartonConfirmed at order
Carton Net / GrossConfirmed at order

Packaging & Wholesale Logistics

The WK18-XC50 ships in carton-ready retail packaging engineered for distributor resale and international freight. Every batch ships with UN38.3 transport test report, IEC 62133 safety certificate, MSDS, and CE Declaration of Conformity for smooth customs clearance in EU, US, UK, AU, and JP markets.

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

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 — a true 5.0Ah 18V pack. It's a fresh-cell alternative to replacing the cells in an old M18 5.0Ah battery, with full warranty and documentation.
What is the MOQ for the WK18-XC50 replacement battery?
Standard MOQ is 100 units for the WK18-XC50. Paid samples of 1–10 units are available for BMS-handshake validation before a production 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 is flashed with M18-specific firmware so it handshakes correctly with genuine Milwaukee chargers — fuel-gauge reporting, authentication, and safety lockouts behave identically to the OEM RedLithium pack. Handshake is validated on 100% of units at end-of-line.
Are these Milwaukee M18 replacement batteries any good?
Yes. Our WK18-XC50 uses Grade-A tier-1 cells (Samsung / LG / Panasonic / BAK), capacity- and resistance-matched, with a BMS validated against genuine Milwaukee chargers on 100% of units. It is built as a professional-grade Milwaukee M18 replacement battery, not a low-cost clone, 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 own warranty covers genuine packs through their service channels. We are an independent factory supplying new WK18-XC50 replacement packs for the M18 platform — a direct, lower-cost alternative when a pack is out of warranty or you need volume supply, with 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 — not a cell-replacement / rebuild service. 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 ships with full safety documentation.
How do I install the WK18-XC50 M18 replacement battery?
It installs exactly like a genuine Milwaukee M18 pack — slide it onto the tool until it latches, and charge it on any genuine Milwaukee M18 charger. No adapter or modification needed.
What cells and configuration does the WK18-XC50 use?
The WK18-XC50 uses Grade-A 18650 cells (2500mAh each) in a 5S2P configuration for a nominal 18V and a true rated capacity of 5.0Ah. Cells are matched by capacity (±20 mAh) and internal resistance (±5 mΩ) before assembly. Preferred cell brand (Samsung / LG / Panasonic / BAK) can be specified at order.
What is the warranty on the WK18-XC50?
All WK18-XC50 replacement packs carry a 12-month warranty against manufacturing defects. Every batch ships with UN38.3 test report, IEC 62133 certificate, MSDS and CE Declaration of Conformity for smooth customs clearance worldwide.

Need a Custom Quote or Technical Details?

Our engineering team is ready to discuss specifications, certification, MOQ, and OEM / private-label customization for the WK18-XC50.

✉ Email Sales 📱 WhatsApp ☎ +86 13823274651

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