The PS4 is quickly becoming a thing.
For reference, here's a handy dandy table:
|SixAxis (no Rumble)||30 mAh||137g / 4.8oz|
|Dual Shock 3||500 mAh||193g / 6.8oz|
|Dual Shock 4||800 mAh||210g / 7.4oz|
|Xbox 360 Wireless||--||265g / 9.35oz|
Hopefully this means the battery life will be improved in spite of that big light on the top.