APC Back-UPS ES 500 Surge Protector

Selling a used APC Back-UPS ES 500 surge protector. It's in good condition but requires a new battery which could easily be found on Amazon Canadian tires or staples. I was going to replace the internal battery but decided to upgrade to a larger capacity. I have another unit that I’m also replacing. Please see my other listings. Thank you for your time. If you have any questions feel free to ask.