The red wire is connected to the positive battery terminal, and the black wire is connected to the negative battery terminal. Easy to install,locks on you battery very well. The products are only used for flexible conversion between one tool and another lithium battery, and do not involve any other brands! The products are only converter, not charger, not battery, not machine, also can not recharge battery by it. Note: Due to different production batches, labeling is random and does not accept designation and does not affect use. Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Applicable for Dewalt 18/20V lithium-ion batteries: DCB180, DCB182, DCB184, DCB200, DCB201, DCB203, DCB230, DCB204, DCB240, DCB205, DCB206 etc. Color:Yellow Material:plastic Package Contents: 1 x Adapter(No Battery)