Comes with 28 hours of Battery Life don't you want to have Extra Battery Life that last longer than your average Controller do you seem to forget to charge yours yeah you can buy those ugly bulky big Battery packs to add on for $20 but they just get in the way and take forever to charge next is it's just ugly having something that big on the back of your controller ,just type in Battery packs on goggle you will see what I'm talking about this is like it came from the manufacturer itself with 2x the battery life to last a whole week one good charge and your all set can't beat it and you can't even tell its there so get you one today...Oh you want to add this to your custom controller just let us know so we can add this to your order just let us know and we will either change the price or send a invoice for the extended Battery ...