Here's the route I went at this stage in the process:
Get two of these:
Ego 510 650mAh USB Passthrough Battery
Each battery has a charger built into the base. In a pinch you can vape and charge at the same time.
You have a 510/ego attachment, so your options are pretty open:
Crystal Clear Vaping This will deliver a good hot vape, and this vendor has free shipping.
eGo Dual Coil Cartomizer - Penny 's Store These things are BEAST.
I've moved on to the Provari, but I still keep my ego passthroughs as a backup.
Always have backups to everything.
Get two of these:
Ego 510 650mAh USB Passthrough Battery
Each battery has a charger built into the base. In a pinch you can vape and charge at the same time.
You have a 510/ego attachment, so your options are pretty open:
Crystal Clear Vaping This will deliver a good hot vape, and this vendor has free shipping.
eGo Dual Coil Cartomizer - Penny 's Store These things are BEAST.
I've moved on to the Provari, but I still keep my ego passthroughs as a backup.
Always have backups to everything.