Our products are only used for flexible conversion between one power tool and another lithium battery. It provides Over Charging Protection, Over Current Protection, Over Voltage Protection, Over Heating Protection, Short Circuit Protection. Product description: Suitable for the following tool models of V7 V8 series: V7 Cord-free Vacuum, V7 Mattress Vacuum, V7 Vacuum, V7 , V7 Extra Vacuum, V7 ABSolute Vacuum,V7 Pro Vacuum, V7 Animal Vacuum, V7 Slim Vacuum, V7 Trigger Vacuum, V7 HEPA Vacuum, V7 Car+ Boat Vacuum,V7 Top Dog Vacuum, V7 Mattress Vacuum V8 Cord-free Vacuum, V8 Mattress Vacuum, V8 Vacuum, V8 ,V8 Extra Vacuum, V8 ABSolute Vacuum,V8 Animal Vacuum,V8 Slim Vacuum GRW40V7V8 is suitable for Greenworks 40V Lithium Battery Replacement for V7 V8 series battery Do not use for a long time, work continuously for more than 15 minutes, please wait for the temperature of the converter to drop before use. The products are only converter, not charger, not battery, not machine, also can not recharge battery by it. Due to different production batches, labeling is random and does not accept designation and does not affect use. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Color:Black & Gray Material:ABS Package Contents: 1 * Adapter (No battery, No tools!) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.