Celestron Elements Hand Warmer and Compass(Update 4/12/17)


The Celestron Elements hand warmer was designed to be a rechargeable spot warmer that will hold an 8 hour charge and produce a relatively constant 115 degree temperature.  It comes with a USB charging cord to plug into a computer or charger.

The charging cord plugs into the micro USB outlet that you find under the lid which comes off when you unscrew the screw on the top of the unit.  Also located there is the on/off switch that operates the 3 way flashlight(white, red and a flashing red/white light) and if you depress the on/off switch and hold it for 4 secs you activate the warmer.  There is a USB charging port to use this unit to charge a USB powered device that might need a quick charge.

When you turn the unit on a red light will be visible on the front of the unit.

Testing Results

After extensive testing I discovered several disappointing things.  I tested the unit inside the house first for length of operation.  Under house conditions the unit kept a charge anywhere from 6.5 hours to 7.25 hours.  Far short of the 8 hours advertised.  Outside on cold winter days the charge would last approximately 5 hours.  If this was meant to be used in a hunting application you would need two of them to stay on your stand all day.  For astronomy outside work in cold conditions it would be very limited.

Secondly, I tested the unit using an optical laser thermometer and found that the 115 degree advertised temperature fell very short also.  Although this is only one picture very similar results were obtained every time I tested it.

I was disappointed in the results I obtained with this unit.  I will grant that the flashlight had a very strong beam and the red light version would come in handy at times, but the unit was meant to be a warmer and the flashlight to me was extra and as a warmer it fell short and not worth expense to me.  I will grant that possibly I had a defective model, but I only had this one to test.


The only good thing I can say about this is it kept good time and after I finally got the compass calibrated it gave good directions.  The altimeter that is part of the unit was not reliable.  My house sits at 482 ft above sea level.  As you can see I calibrated it for that height and sat it on a table in my man cave.  Over the next several days the altimeter changed from 482 to 425 to 455 to 462 to 475 to 492 and this was never touched.  I was beginning to believe my house was undergoing uplift and subsidence and I couldn't even feel it.  Then there is the barometer.  I'm a bit of a weather geek and own both an AccuRite 5-1 weather station and a Davis Vantage Vue.  Both are written up in another tab on this blog.  They both currently read within .02 of an inch of Hg of each other.  When comparing the barometer in the compass to them the compass barometer was lower by .44 of an inch of Hg.  Anyone that understands air pressure weather readings will recognize that a large difference like that could be the difference between very nice weather and stormy conditions.  I find that unacceptable especially for a unit that may be used for outside activities.

No comments:

Post a Comment