Thanks HKJ, that’s a good idea.
I have the Xtar SP1 charger and looked through your review for standby current for just the Xtar walwart (don’t know the correct name to call it) while plugged into wall but not plugged into charger (12V input) and I see you don’t test that.
It could be a nice addition to your reviews to add this info if you wish.
I’ve plugged the Xtar walwart back in when not in use as it was a slight hassle to plug/unplug into wall when wanting to charge. I do however unplug the charger end (12V input)
Every charger model is different so you have to check yours. There has been government pressure and some regulation to cut phantom power usage because as it rises it increases societal electricity consumption for little benefit, but there is still a long way to go, some items like cable boxes typically use a great deal of power when idle.
It does not say much, many meters has a tolerance of +/- a few counts on the last digit. That means 0.1 can mean 0.01 or 0.3. When you are up to two digits it is not really that significant any more.
Well we all know errors have the greatest impact on tiny measurements like the vampire current I was measuring. But it’s an incredible device for $17. Let me say that again, $17. Here is how it compares to a fully calibrated $500 Fluke 87v with True RMS.
Fluke 87V True RMS Multimeter with AcuCal calibration
123.0 V
0.016 A
60.01 Hz
Kill-A-Watt P3 P4400
123.4 V
0.01 A
60.0 Hz
0.28 PF
2.1 VA
That goes beyond the accuracy I would expect for $17 and makes this an incredible device. ToyKeeper can back this up I bet, but it’s very likely the Amps are truncated for display instead of rounded so they could be much more accurate than this test reveals.