Amazon.com: X-Adapter 1x Adapter for Ryobi 18v Tools Works On Bosch 18v Blue Professional Batteries (Not 18v PBA All Battery)- Adapter Only, Black (BS-RY18) : Tools & Home Improvement
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Amazon.com: AuthFrank BS18DL Battery Adapter converts for Bosch 18V Lithium Battery to for Dewalt 18V/20V Lithium Battery DCB184/DCB181/DCB182/DCB200/DCB201 etc. : Tools & Home Improvement