RYB18HK Ryobi 18V to Hitachi Battery Converter Adapter

Use Your Ryobi 18V Batteries on Hitachi Power Tools

The RYB18HK Battery Converter Adapter is the smart, cost-effective solution for tradespeople and DIY enthusiasts who own both Ryobi and Hitachi (HiKOKI) 18V cordless tools. Instead of buying duplicate battery packs, simply plug this adapter in and power your Hitachi tools with your existing Ryobi 18V batteries — Li-Ion, NiCad, or NiMH. Built-in PCB protection circuitry ensures a stable, safe connection between the two battery systems.

Made in Mainland China.

⚠️ Package Includes Adapter Only — No Battery or Power Tool Included. Images showing batteries and tools are for compatibility illustration purposes only.

Compatible Ryobi 18V Batteries (Input Side)

18V Lithium-Ion:

BPL-1815, BPL1820, BPL-1820G, BPL18151, P102, P103, P104, P105, P106, P107, P108, P109, P122, P161, P162, P164, P189, P190, P191, P192, P193, P194, P197, RB18L50

18V NiCad:

P100, P101, ABP180S, BPP-1813, BPP-1815, BP-1817, BPP-1817/2, BPP-1817, BPP-1820, BPP1817M

18V NiMH:

130224028, 130224007, 1255004, ARP1801, ARP1803, ECP1817/2SY, BPP-1813, BPP-1815, BPP-1817, RPP-1817, BPP-187, TBP-1820

Replaces These Hitachi 18V Batteries (Output Side)

When used with a Ryobi P108: BSL1830, BSL1840, BSL1815, 326240, 326241, 327730, 327731

Compatible Hitachi / HiKOKI Power Tools

DS18DSAL, DH18DL, G18DLXC, 18DL, DH18DLX, G18DLP4C, 18DLX, DH18DLP4, KC18DAC, 18DMR, DS18DFL, RB18DL, C18DLP4, DS18DFLG, RB18DLP4CJ, 18DL, DS18DL, UB18DCJ, 18DLX, DS18DMR, UB18DLCJ, 18DLP4, DS18DVB, UB18DLC, CR18DL, DS18DVB2, WH18DLCR, 18DLX, DS18DVB2K, WH18DMR, CR18DMR, DS18DVF3, WH18DFL, CR18DV, DS18DLP4, WH18DLP4, CR18DLP4, DV18DCL, WR18DL, G18DL, DV18DL, WR18DMR, C6DC, DV18DMR, WR18DLP4, C6DD, DV18DV, DV18DLP4, DV18DVKS, and more.

Key Features

• Universal Compatibility: Works with all Ryobi ONE+ 18V battery types — Li-Ion, NiCad, and NiMH.
• Built-In PCB Protection: Integrated circuit board ensures stable voltage delivery and safeguards your tools and batteries.
• Plug-and-Play Design: No modifications needed — simply connect and start working.
• Low-Voltage Safe: Operates within the safe low-voltage range (below 75V DC / 50V AC).
• Save Money: Eliminate the need to purchase additional Hitachi battery packs.
• Compact & Lightweight: Minimal added bulk to your existing tool setup.

Package Contents

• 1 × RYB18HK Battery Converter Adapter (Adapter Only — No Battery, No Tool)

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Frequently Asked Questions

Q: What does the RYB18HK battery adapter actually do?

A: The RYB18HK is a converter adapter that allows you to use Ryobi 18V ONE+ batteries (Li-Ion, NiCad, or NiMH) in Hitachi and HiKOKI 18V power tools. It bridges the different battery terminal formats so you can power your Hitachi tools without buying separate Hitachi battery packs.

Q: Does the package include a battery or power tool?

A: No. The package contains only the RYB18HK adapter. Any batteries or power tools shown in product images are for compatibility illustration purposes only and are not included with your purchase.

Q: Which Ryobi battery models are compatible with the RYB18HK adapter?

A: The adapter is compatible with a wide range of Ryobi 18V ONE+ batteries, including popular models such as P102, P103, P104, P105, P106, P107, P108, P109, P122, BPL1820, and many more Li-Ion, NiCad, and NiMH variants. Please refer to the full compatibility list in the product description above.

Q: Is it safe to use this adapter with my power tools?

A: Yes. The RYB18HK features a built-in PCB (printed circuit board) that helps regulate voltage and protects both the battery and power tool during use. It operates within a safe low-voltage range (below 75V DC / 50V AC).

Q: Will the RYB18HK adapter work with HiKOKI tools (formerly Hitachi)?

A: Yes. HiKOKI is the rebranded name for Hitachi Power Tools, and the RYB18HK adapter is compatible with both Hitachi and HiKOKI 18V cordless power tools listed in the compatibility chart above.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.