Bests & Worsts Reviews from Amazon

Looking for something to keep my coffee hot enough to drink, I tried two mug warmers. 1. Mr. Coffee Mug Warmer for Coffee and Tea, Portable Cup Warmer that uses 17 watts and has a burner size of 3 3/8 inches diameter. The on/off switch is a manual slider switch on the top of the warmer. 2. Smart Coffee Warmer, BESTINNKITS Auto On/Off Gravity-induction Mug Warmer that uses 19 watts and has a burner size of 4 1/2 inches diameter. The warmer turns on when a ceramic, glass, or metal mug of sufficient weight is placed on the burner and turns off when it is removed. To see how they compared, I boiled water and made tea, then poured equal amounts of the tea into identical cups. I then placed one on each warmer, turned them on, and then used an infrared thermometer to check the temperature (in F) of each cup regularly for two hours. Room temperature during the test was 71F. Below are the results. Time elapsed / Mr. Coffee Mug Warmer temperature / Smart Coffee Warmer temperature 0 min 154 154 29 min 123 127 64min 110 115 95min 107 113 110min 106 112 120min 106 112 Both warmers performed similarly, but it's worth noting the Smart Coffee Warmer kept the tea 4 to 6 degrees warmer. Is the weight switch, larger burner, and slightly higher temperatures worth the extra cost? That likely depends on the person looking at these.