small 12 volt battery from motorcycle. Yuasa ytz14s. NO CRANKING AMPS. But has 12.75 volts. Might be good for a solar project or for lead scrap I tried removing the cover no leaks to check fluid level as you can see in photos but could not. So just bought a new battery online. However if your going to buy a battery at the store you can use this as a core so they dont charge you $25 for not having a battery to turn in. Again NO CRANKING AMP just 12.75 volts