I used the ECHO charger that came shipped with the starter kit. it matches others I now also have in appearance and labeling, and it is still charging other ECHO batteries without issue. One of my other ECHO USB chargers died, but they are cheap (in price) and I still have two others. They are from two different suppliers now, but still appear and are labeled exactly the same. I don't think the charging unit had anything to do with the battery overcharging, overheating and exploding.
My only real complaint with my new ECHO setup right now is these ECHO cartomizers. Whether single or dual-coil, at best I only get about a week of decent performance out of them before I have to get rid of them, even after a fairly decent flush cleaning. I did just get a nice little cartomizer flushing kit, but I haven't tried it out yet. I have high hopes for it, but these cartomizers will only last through so many cleanings before they aren't any good anymore, no matter what.
My only real complaint with my new ECHO setup right now is these ECHO cartomizers. Whether single or dual-coil, at best I only get about a week of decent performance out of them before I have to get rid of them, even after a fairly decent flush cleaning. I did just get a nice little cartomizer flushing kit, but I haven't tried it out yet. I have high hopes for it, but these cartomizers will only last through so many cleanings before they aren't any good anymore, no matter what.