It uses a titanium tub that is essentially a solid (think sheet metal) sheet formed into a tub, works with TC. It is the same electrical circuit as when using a coil or mesh. Each tub has its own resistance value and there is a calibration process built into it.I am curious what heating element it uses. Looks like maybe a ribbon?
This device has a built-in rechargeable battery as well as taking 4 AA batteries. No where does it say to use rechargeable AA batteries. So I plug it in to 100v and with no AA's installed I measure 7+ volts from the battery terminals. This could be a hazard if using non rechargeable batteries.
Oh that isn't good!I'm charging the AA NiMH's in a stand alone charger. I'll be pulling them out when the power is restored. The way I noticed the connection was the internal battery was all but dead. After trying out some regular AA's and then removing them the internal battery had some charge put to it from the AA's.
The longest I had without power was 30 hours. Everything looked fine in the freezer and even the ice cubes didn't melt. Vacuum sealed lunch meat, tortillas, onions, and a few other stuff tasted fine. Other stuff like meatloaf, TV dinners, sausages, etc. turned into something else when thawed. It didn't smell spoiled, but it didn't smell like food either. Meat turned into something soft and mushy like mashed potatoes. I never tasted any of it, I just tossed it out.Edit: I just checked the refrigerator's freezer, totally OK, not even did any ice cubes start to melt. Ice cream is a bit soft but OK too.