Makita 18V LXT Battery Extension Cord

This 3D-printed design enables you to extend the reach of your Makita LXT battery by connecting the chainsaw to the battery through a durable extension cord. Ideal for use with tools like the SawLink series or any application where the weight of the battery needs to be shifted to a more convenient location, such as the base of a pole or a belt. Pair this extension cord with this 3d printed Makita-compatible belt hook for added convenience during use.

Printer Settings:

• Filament Type: PETG, ASA, or another durable, impact-resistant material suitable (for electrical safety ideally use PETG-V0 for the Battery top and connector cover)

• Wall Thickness: >2 mm for additional strength

• Infill: >30%

• Supports:  Only required for Battery top and Battery button, use tree support to make them easier to remove

• Nozzle Size: >0.4 mm

Assembly Instructions:

1. Print all Components:

   • Print the provided STL files in the recommended materials. The Battery top and connector cover should ideally be printed in a V0 material if you want to do it by the book since they are so close to the connectors

   • As stated only the Battery top and Battery button  needs to be printed with supports, the battery button must be printed with the spring parallel with the printing surface to work properly.

   • Ensure all parts are printed cleanly and check tolerances for snug fits.

   • Assemble 1pcs M20 Cable gland to the battery bottom and  another to the battery holder

2. Connect battery module Electrical Components:

   • Crimp the 3 pcs of 6.3mm female automotive terminal connectors to min 5cm leads of min 1,5mm2 (AWG 16)

   • Connect the leads to the connector block

   • Fix the terminal block and connector cover to the battery top using 2pcs of 3x15mm self tapping screws

   

   • Insert the cable through the cable gland and fix each lead to the appropriate part of the terminal block (black/brown = Positive/Line, Blue = Negative/Neutral, yellow/green = auxiliary connector).

   

   • Fix cable in cable gland firmly

   

   • Assemble battery bottom to battery top using 4 pcs of 3x10mm self tapping screws

   

   

3. Connect battery holder with switch electrical components:

   • (SKIP IF NO SWITCH) Connect 2 pcs of min 7cm brown or black lead of min 1,5mm2 (AWG 16) to the Switch (solder or snap on terminal connector)

   

   • (SKIP IF NO SWITCH) Connect one of the brown or black leads to the positive side of the Makita terminal connector (643852-2 or similar)

   

   • Insert the cable through the cable gland

   • Connect the remaining brown black lead to the brown or black lead to the same coloured lead in the cable. Connect the blue and yellow/green of the cable to the Makita terminal connector (solder or snap on terminal connector).

   

   • Ensure proper insulation and secure connections to prevent shorts or loose contacts.

   • Fix cable in cable gland firmly

   • Use the long Self-Tapping Screws to tighten the two battery holder halves to each other

   

   

4. Test the Cord:

   • Before use, test the extension cord with a multimeter to confirm proper connectivity and voltage output.

   • Double-check for secure insulation and housing assembly.

Usage Instructions:

• Connect one end of the extension cord to the Makita LXT battery and the other to your tool.

• Secure the battery at the desired location (e.g., belt or base of a pole) for weight balance and convenience. For optimal results, use my Makita-compatible belt hook.

• Always disconnect the battery when not in use or when assembling/disassembling components.

Features:

• Lightweight, durable design.

• Relocates the battery for better balance and reduced fatigue during operation.

• Fully compatible with Makita LXT batteries and tools.

Bill of Materials (BOM):

Other models of interest:

Snap-On Cable Clip for Tubes (Ø3–12 Cables, Ø20–50 Tubes) - Easy to use, durable, and versatile for organizing cables

Disclaimer:
Use this extension cord design at your own risk. Muffelkraft holds no responsibility for injuries, damages, or improper use. Ensure all electrical work is performed safely and according to local regulations.