Ryobi TEK4 AP4001 Replacement 4V Lithium-Ion 1.3 ah Battery # 130166010 Ryobi Genuine OEM Part # 130166010 Inlcudes: (1) - Ryobi TEK4 AP4001 Replacement 4V Lithium-Ion 1.3 ah Battery # 130166010 Works with Ryobi Tools New, Bulk-Packed Refer To List Below for Compatibility