Get Quote
Power Tool 18V · 1.5Ah
Milwaukee WK18-XC15 18V 1.5Ah
Milwaukee M18 Compact Replacement

Milwaukee WK18-XC15 M18 18V 1.5Ah Compact Replacement Battery

Drop-in replacement battery for the Milwaukee M18 compact platform. The WK18-XC15 is a true 1.5Ah M18 18V replacement battery (5S1P, 18650) and a direct replacement for the Milwaukee 48-11-1815 / 48-11-1811 M18 compact RedLithium battery, with verified BMS handshake on genuine Milwaukee chargers.

Voltage18V
Capacity1.5Ah
Cell Type18650 cells
Configuration5S1P
Get Quote →

Overview

Drop-in replacement battery for the Milwaukee M18 compact platform. The WK18-XC15 is a true 1.5Ah M18 18V replacement battery (5S1P, 18650) and a direct replacement for the Milwaukee 48-11-1815 / 48-11-1811 M18 compact RedLithium 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-XC15 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-XC15 18V 1.5Ah view 1Milwaukee WK18-XC15 18V 1.5Ah view 2Milwaukee WK18-XC15 18V 1.5Ah view 3Milwaukee WK18-XC15 18V 1.5Ah view 4

Compatible Host Tools

  • Milwaukee M18 compact drills & drivers
  • M18 lights and small cordless tools
  • 48-11-1811 / 48-11-1815 compatible tools

Target Applications

  • Compact M18 Tool Kits: The lightweight 1.5Ah WK18-XC15 keeps M18 compact drills, drivers, and lights balanced for overhead and confined-space work.
  • Service Fleets: A direct 48-11-1815 replacement that keeps technicians moving without the weight of high-capacity packs.
  • Private-Label Distributors: Sourced with your branding and carton-ready packaging as a Milwaukee M18 replacement battery.

Core Technical Advantages

1. Direct 48-11-1815 Replacement

Matched M18 latch geometry and contacts make the WK18-XC15 a true drop-in for the Milwaukee 48-11-1815 / 48-11-1811 M18 compact RedLithium battery.

2. Compact 1.5Ah 5S1P

A 5S1P string of Grade-A 18650 cells delivers a genuine 1.5Ah in the lightest M18 form factor.

3. Verified Charger Handshake

BMS flashed with M18-specific firmware handshakes correctly with genuine Milwaukee chargers — fuel-gauge reporting and safety lockouts behave identically to the OEM RedLithium pack.

Product Video

Factory assembly line, BMS testing, and WK18-XC15 demonstration footage. Contact sales for additional product videos.

Technical Specifications

FeatureSpecification
Replacement ModelWK18-XC15
Compatible BrandMilwaukee (M18 RedLithium)
Nominal Voltage18V
Rated Capacity (real)1.5Ah
Cell Type18650 · 1500mAh
Configuration5S1P
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-XC15 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-XC15 replace the Milwaukee 48-11-1815 M18 compact RedLithium battery?
Yes. The WK18-XC15 is a direct replacement for the Milwaukee 48-11-1815 and 48-11-1811 M18 compact RedLithium batteries — same latch, same fit, same charger handshake, at a true 1.5Ah.
What is the MOQ for the WK18-XC15 replacement battery?
Standard MOQ is 100 units for the WK18-XC15. 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-XC15 drop-in compatible with original Milwaukee M18 chargers?
Yes. The WK18-XC15 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-XC15 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-XC15 different?
Milwaukee's own warranty covers genuine packs through their service channels. We are an independent factory supplying new WK18-XC15 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-XC15 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-XC15 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-XC15 use?
The WK18-XC15 uses Grade-A 18650 cells (1500mAh each) in a 5S1P configuration for a nominal 18V and a true rated capacity of 1.5Ah. 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-XC15?
All WK18-XC15 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-XC15.

✉ Email Sales 📱 WhatsApp ☎ +86 13823274651

Related Milwaukee Replacement Batteries

Other production-ready SKUs for the Milwaukee M18 platform

Power Tool 18V · 2.0Ah Milwaukee WK18-XC20
Milwaukee WK18-XC20
View details →
Power Tool 18V · 4.0Ah Milwaukee WK18-XC40
Milwaukee WK18-XC40
View details →
Power Tool 18V · 5.0Ah Milwaukee WK18-XC50
Milwaukee WK18-XC50
View details →
en_USEnglish
de_DEGerman es_ESSpanish fr_FRFrench it_ITItalian pl_PLPolish ru_RURussian thThai tr_TRTurkish jaJapanese ko_KRKorean en_USEnglish
Live agent Customer service Get A Quota