Review on Stay Warm And Connected: BRIGENIUS 5200MAh Rechargeable Hand Warmers With Double-Side Heat Therapy And Phone Charging Capability – A Perfect Winter Gift! by Cesar Carter

When I got it, I plugged it in to top off the charging, and after 5 hours, it finally filled up from just two blue lights and 1 blinking blue to 3 solid blue lights. That's a pretty long time for 1 light.It's supposed to have 3 settingsI did my testing with an infrared thermometer (point and pull the trigger) and also a regular inside wall thermometer (which I can lay the sensor right on top of the warmer) which both seem to register the exact same temps for the ambient room (68.7 on the infared and 68.5 on the room one) and the hand warmer itself.1 red light - 104 degrees2 red lights - 122 degrees3 red lights - 140 degrees.But what I get is1= about 103 (pretty close to the manual and seems to fluctuate between 102 and 104)2 = 105 (almost no change from the first setting but two lights now lit)3 = 108 (all 3 lights lit, should be almost too hot to hold at 140)While 104 to 108 is warm enough to keep my hands from freezing, it's not really what I was paying for. Even the middle setting at 122 degrees should be pretty warm to handle for a long time, but it's not getting there. I will (unless the seller has something to tell me that I might have missed) be sending it back.I can't think of anything I could possibly be missing, it's not like it's hard to use and the directions are very simple, it just doesn't get warm enough.(one other odd thing I have noticed is that when set to 2 or 3 lights, the temperature will drop to around 100 degrees after about 5 minutes then go back up to where it was before after about 2 minutes). I suppose if you were going to hold it for a while, and it really got hot, that it might be pretty unnoticeable or even comfortable, but when it's barely warm it's not a good thing. One red light seems to stay within a degree or two of the normal number.