Kezo I took it up the tip yes could have been battery how much would that have been ?
Genuine about £85 from Dyson or upgraded aftermarket one are popular: https://www.bing.com/shop?q=oem+dyson+v8+upgraded+battery+uk&FORM=SHOPTB
https://www.amazon.co.uk/dyson-v8-replacement-battery/s?k=dyson+v8+replacement+battery