Yes, a 650 mAh battery will probably last you 4.5 - 5 hrs on a good day. This is why people use batteries like these:
$14.79 Panasonic NCR18650B Rechargeable 3400mAh 3.7V 18650 Lithium Batteries 2-pack - authentic cells / 2-pack at FastTech - Worldwide Free Shipping
in something like a Vamo for an all-day vape.
These babies are stronger than my phone's battery! I bet there is no way I could use these instead of 510 with my clearo... (I mean without totally remaking whole e-cig into box or something)