Sounds like its kicking off to protect itself because there's a short somewhere in the system. It's happened to me. Check that your coil is screwed in tightly and if it is and doesn't stop, try switching to another coil. You also have to be careful not to under or over tighten the battery when screwing it in. Sometimes if you don't have it tight enough or too tight it will do that.
And if you're looking for something along the same lines as what you have, I love my vision spinner 2's, they have both 510 and ego threading so they fit everything. They have more capacity too at 1600mah.
If you're looking for a box type, I'm getting an Eleaf Istick pretty soon, it's been getting good reviews and comes with built in 510 for your protank and an ego adapter for those t3's.
Hope that helps a bit.