My recommendation for an upgrade would be to get some Evod tanks. Decent vapes from an ego battery with the Evod tanks. The T3's are decent too. Much better than the CE4.what you have is the standard starter kit sold everywhere, they are good for "testing the waters" of vaping. They dont have a good reputation for longevity, maybe the battery will last a few months, the tank will last several weeks but the coil will last only a few days. Vapor production is ehhhhh...
I had a couple of them when I started vaping and went to better hardware due to the lack of battery life and vapor flavor...
give it a shot for a while, learn what you like/want out of vaping and do some research on upgrades...
And I have been using the same style of battery from cheapo starter kits for 6 months so far and only one quit, the rest are going fine. Mine are only 650ma though.
This is where I got my starter kits cheapo but work well. Now if you want to blow clouds you will need a much bigger and more expensive setup. But these work fine for me.
EVOD 650mAh Variable Voltage Blister Pack | Cheap Ecig Starter Kit | High Quality - MyFreedomSmokes