Bottom of the converter: compatible with Makita BL series 18V lithium ion battery;Converter top: compatible with Dewalt 18V nickel electric power tools;[Dewalt 18V nickel electric power tools must be compatible with 18V, Ni-Cd/Ni-MH DC9096 DE9095 DE9096 DE9098 DW9095 DW9096 DW9098 DE9503 models]This converter has a built-in protection board and discharge protection system;Effectively protect your battery from over-discharge (Makita battery voltage is lower than 15V automatically disconnect the circuit).Converting Makita 18V lithium battery to Dewalt Ni-Cd/Ni-MH 18V nickel battery tool, through this converter can be used on the old Dewalt (Dewalt) Ni-Cd/Ni-MH 18V nickel battery tool Makita 18V lithium battery, it allows Makita 18V lithium battery to share the battery with the old DeWalt 18V nickel battery tool.Bottom of the converter Applicable Makita battery model:BL1815 BL1815B BL1820 BL1820B BL1830 BL1830B BL1840 BL1840B BL1850 BL1850B BL1860 BL1860B BL1845 BL1890 BL1890B, 18V lithium batteryConvert to Dewalt battery model:Dewalt 18V NI-CD/NI-MH battery, Dewalt 18V XRP DC9096 DE9039 DE9095 DE9096 DE9098 DW9095 DW9096 DW9098 DE9503Package included:1 * Battery AdapterNote:This converter does not support Makita (Makita) 18V lithium battery and Dewalt (Dewalt) shared charger