Our stuff has gotten more reliable as the years has passed. We (I) have become complacent in many areas. I almost had a major incident yester during a charge session. I was repairing lawnmower and placed my trusty Jersey Modeler fueler on charge. NiMh batts....no worry. The jug was on the steps of my shop next to my trailer and new RV. For some reason I looked up and smoke was pouring from my fueler. I grabbed it off the charger and ran into the yard down the hill from my stuff. Luckily I caught it in time and no fireball occurred. A few seconds more or leaving charging batteries unattended almost cost me my airlpane trailer, shop, all my jets and an RV. JERSEY MODELER is replacing the charger and battery for free....OUTSTANDING SERVICE for an OUTSTANDING PRODUCT! Be careful out there.