Thank you for viewing. I am selling this because it is no longer needed due to the cancellation of my phone line. I rarely used a landline, so it was practically just sitting there. The battery life is unknown. *The battery is not guaranteed to work. Please refer to the manufacturer's website below for product specifications. https://panasonic.jp/phone/products/VE-GDW03DL.html *The instruction manual can be downloaded from the above support page. Shipping is planned using Eco-Mercari delivery (designated delivery location). Thank you.