Compatible with V7 series vacuum cleaners, such as V7 Pro, V7 Trigger, V7 Animal, V7 , V7 Mattress, V7 Absolute, V7 Car+Boat, etc.; Works with v8 animal vacuum 229602-01, v8 absolute vacuum 214730-01, v8 vacuum , v8 vacuum , v8 handheld series vacuum, v8 SV10 vacuum 967834-02 96783402 and v8 animal cordless vacuum. Compatible with 18V lithium-ion compact cordless tool batteries BL1860, BL1850B, BL1850, BL1840B, BL1840,BL1835, BL1845 -400, etc. High efficiency battery. It is recommended to use 4A and above batteries due to the high power of the vacuum cleaner. Convert for battery to V7 V8 battery: Reuse for your batteries and save your money from frequently buying new replacement V7 V8 batteries. More powerful than the old V7 V8 SV10 SV11 battery, provides longer running time. Made of flame retardant ABS material, which provides overvoltage, overcurrent, overheating and short circuit protection. Diagnostics with LED indicator to communicate battery working status. (Note: Please remove