Hikoki Hitachi 18V Battery Power Adapter DIY
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Description
Turn your Hikoki / Hitachi 18V tool batteries into a compact portable power source.
This 2-part adapter slides directly onto compatible Hikoki/Hitachi 18V batteries and provides simple access to the battery terminals using two small aluminum contact plates. The top cover screws onto the base to protect the wiring and create a clean, flat backside.
Originally designed to power a small water pump for transferring fresh water from a barrel into a camper, but it is also perfect for many other portable DIY power projects.



Metal connectors:
General dimension see picture.Thickness between1 and1.5mm.
Chamfer 1edge so it slides into the contact more easily.

Features
- Fits Hikoki / Hitachi 18V batteries
- Simple 2-part design
- Uses aluminum contact strips for battery terminals
- Screw-on cover for cable protection
- Flat backside for easy mounting
- Compact and easy to print
- Ideal for portable off-grid setups
Possible Use Cases
- Camper fresh water transfer pump
- Portable camping shower pump
- LED lighting projects
- Small ventilation fans
- Portable soldering station
- RC battery charging setups
- DIY bench power source
- Fishing or boating accessories
- Emergency power adapter
- Small air pumps
- Electronics testing
- Arduino / ESP32 projects
- Portable USB converter projects
- Field repairs and service kits
Notes
- Designed for low-power DIY applications
- Always double-check polarity before connecting devices
- Use appropriate wire thickness and fuse protection for safety
- Use small 4mm screws (20mm) to mount the 2 parts
If you build something useful with it, upload a review and photo — I would love to see different applications!
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.




























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