Suitable for 18V batteries, it is only converted to 18V lithium batteries to replace for batteries. With these two products, when the primary battery is damaged, you can use the vacuum cleaner as usual instead of buying a new one. Compatible with 18V BL1860 BL1850 BL1840 BL1830 BL1820 BL1815 194205-3 194309-1 194204-5 series 18V batteries. Our battery adapter is designed for the V7 vacuum cleaner, which is compatible with the series. It is very suitable for absolute animal engine head cordless vacuum cleaner handheld vacuum cleaner. [More and longer running time] This adapter allows the use of the listed lithium batteries on for lithium cordless electric vacuum cleaner. It is easy to install and disassemble, durable and safe, and easy to clean. Matched with 18V lithium battery, suitable for series vacuum cleaners. Simply remove all of them after use. (The adapter is only applicable to series vacuum cleaners) The battery adapter is designed with an LED indicator light to display the battery status. The indicator light shows green, indicating normal operation; It shows red, which means there is insufficient power. High quality plastic material, suitable for long-term use. [Protection System] Sturdy design, high-quality plastic material. This battery adapter can tightly lock the vacuum cleaner and battery together without loosening or slipping. High temperature resistance, allowing you to work with peace of mind! Different batches, random label does not affect the use Colour:Gray-black Material:plastic Package Contents: 1 x Adapter 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.