Please be sure to read the entire product description. Please refrain from excessive price negotiations. This is a PROCORE WindCore NEXT WORKERZ 21V battery. It is exclusively for the WZ4600. It's a set of a 21V battery and fan. I bought it new for 19,800 yen, but I didn't use it, so I'm selling it. The outer box has some damage, but the contents are unopened. Battery capacity: 48.24Wh 3350mAh Output: Display 4 (21V) / Display 3 (15V) / Display 2 (13V) / Display 1 (10V) Storage temperature: -10℃～50℃ Operating environment temperature: 0℃～40℃ Charging completion temperature: 0℃～40℃ Input voltage: DC16.8V/1500mA I do not smoke. I also do not have any pets. If you would like detailed images, please specify the areas you would like photographed. This item is a used item that has been in someone's possession once, so we cannot accept returns, exchanges, or complaints after purchase. Please be sure to purchase after confirming the above and the photos. buyee doorzo heyco zheying JPGOODB UY 合馬 JADEX We offer immediate purchase approval. Our store deals exclusively in authentic products, so please feel confident in making your purchase.