18V Li-Ion Battery Adapter Converter for BL1830, BL1840, BL1850 & Dayi A3/2106

Unlock cross-platform compatibility for your 18V power tools with this compact, durable Li-Ion Battery Adapter Converter. Designed to bridge the gap between BL1830/BL1840/BL1850 battery packs and Dayi A3/2106 tool platforms (and vice versa), this adapter lets you power more tools with the batteries you already own — no need to buy expensive new battery systems.

Key Features

Dual Compatibility: Available in two types — convert Dayi A3/2106 batteries to run 18V BL-series machines, or convert BL1830/BL1840/BL1850 batteries to power Dayi A3/2106 tools.
Easy Installation: Snaps securely onto your battery with a firm locking fit — red wire to positive terminal, black wire to negative terminal. No tools required.
High-Power Ready: Built for demanding, high-power applications — handles the full output of 18V Li-ion battery platforms.
Sturdy Plastic Construction: Lightweight yet durable black plastic housing protects internal connections during regular use.
Compact Size: Measures approximately 95 × 74 × 33 mm — minimal bulk added to your setup.

Specifications

Material	Plastic
Color	Black
Battery Voltage	18V
Dimensions	Approx. 95 × 74 × 33 mm
Quantity	1 × Battery Adapter
Type A	Dayi A3/2106 battery → 18V BL-series machine
Type B	BL1830/BL1840 battery → Dayi A3/2106 tools
Country of Origin	Made in China

Package Contents

1 × Battery Adapter Converter (battery not included)

Notes

Actual color may vary slightly from product images due to monitor brightness and lighting conditions.
Please allow a slight measurement deviation (±1–2 mm) for listed dimensions.

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For guidance on safe handling and use of lithium-ion batteries in power tools, refer to the U.S. Consumer Product Safety Commission (CPSC) – Lithium-Ion Battery Safety.

Learn more: Anker

Frequently Asked Questions

Q: Will this battery adapter converter work with all BL1830, BL1840, and BL1850 batteries?

A: This adapter is designed to be compatible with standard 18V Li-ion BL1830, BL1840, and BL1850 battery packs. Please check the type (A or B) before ordering to ensure you select the correct conversion direction for your specific tools.

Q: Is the battery included with the adapter?

A: No, the battery is not included. The package contains one (1) battery adapter converter only. You will need your existing 18V Li-ion battery pack to use with this adapter.

Q: How do I install this adapter safely?

A: Installation is straightforward — align the adapter with your battery pack and press it firmly until it locks into place. Connect the red wire to the positive terminal and the black wire to the negative terminal. Always ensure the tool is powered off before connecting or disconnecting the adapter.

Q: Is this adapter suitable for high-power tools?

A: Yes. This adapter is built for high-power applications and can handle the full output of an 18V Li-ion battery platform, making it suitable for a wide range of power tools.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.