How many amps does this device use (ie, for calculating amp hours)?
2064307
Here is a simple calculation: Since the maximum power is supposed to be 3W then 3W / 5V = 0.6A. This is if the 3W are RMS, but most likely it is peak power, then the maximum current is about 0.4A.
2064308
It doesn't use much, I think I noticed my power supply using about 150mA/.150A.
2278700
In accordance with Ohm's Law, a device using 1.18 amps at 12 volts is consuming 14.16 watts (LO setting). Drawing 1.62 amps at 12 volts equals 19.44 watts (MED setting). 2.58 amps at 12 volts equals 30.96 watts (HI setting). I used amps in my post as it does not require calculating watts. If you have a 100 amp battery and you do not want to draw it down more than 80%, you have 80 amps available for use. Using 1.62 amps, just divide 80 by 1.62 to learn you have approx 49.38 hours of run time. For a complete explanation of Ohm's Law, which is the relationship between volts, current and resistance, look it up at www.wikipedia.org. Good luck to you! In accordance with Ohm's Law, a device using 1.18 amps at 12 volts is consuming 14.16 watts (LO setting). Drawing 1.62 amps at 12 volts equals 19.44 watts (MED setting). 2.58 amps at 12 volts equals 30.96 watts (HI setting). I used amps in my post as it does not require calculating watts. If you have a 100 amp battery and you do not want to draw it down more than 80%, you have 80 amps available for use. Using 1.62 amps, just divide 80 by 1.62 to learn you have approx 49.38 hours of run time. For a complete explanation of Ohm's Law, which is the relationship between volts, current and... » Read More In accordance with Ohm's Law, a device using 1.18 amps at 12 volts is consuming 14.16 watts (LO setting). Drawing 1.62 amps at 12 volts equals 19.44 watts (MED setting). 2.58 amps at 12 volts equals 30.96 watts (HI setting). I used amps in my post as it does not require calculating watts. If you have a 100 amp battery and you do not want to draw it down more than 80%, you have 80 amps available for use. Using 1.62 amps, just divide 80 by 1.62 to learn you have approx 49.38 hours of run time. For a complete explanation of Ohm's Law, which is the relationship between volts, current and resistance, look it up at www.wikipedia.org. Good luck to you! « Show Less
1093221
Buy a P3 P4400 Kill A Watt meter......they're about 19 bucks and will tell you exactly how much power its using
443817
no I measured the amps. at between 130 - 160 ma. thats at 12v-13.6vdc hop it helps
65462
It depends on how long you want to use the power inverter and how many watts per hour you are going to use and will you be charging the battery at the same time or just use a battery without charging .The formula is (amps x 120 v = watts X hour) amp draw should be listed on tag by the model number
2069243
Only if it is12v led. The battery is pretty stout, but you only have 12 ah (amps per hour). With that said you will have to calculate the rate it will drain the battery.DC watts to amps calculation formulaThe current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V):I(A) = P(W) / V(V)So amps are equal to watts divided by volts.amp = watt / volt12 = 144w / 12vMax run time on a perfect charge/battery 12 hrs.
1345051
It would completely depend on what you are running I have not ran it down yet but you never really want to run a battery with high amp draw down under 40% with. I would guess a dc refg 3 days. You take the total amp hours times 12 gives you the watt hours on the battery. I haven't done it yet.
1157022
Don't know, but it puts out 2.1 amps. I found it enough to charge all of my USB devices.
579031
No.. But I understand and have measured the device used 20ma Sooooi. Add 20ma to your total when you need to know the whole usage I tested using a split USB cable and 2nd meter
713983
I don't know for sure. It's not indicated on the unit. I have used it to charge relatively low power devices (about 2 Amps total) with no problem.
1402106
I'm not sure. Mine is running a car stereo. It can run for sereval hours. I just don't know how many amps I'm pulling from the battery.
807057
I just bought a space saver 6. I use a Kill-a-Watt device to measure the power consumption. It is around 40 watt per hour.
2033938
I usually change it over the night, so I haven't counted the hours. But I guess it probably would take about 3 hours. BTW, the 110V power -> USB adapter is not included.
389499
Not sure how small but the display comes up as 000.0 and I have read .5 amps. Hope this helps.
291945
They are probably overrated, but 1000 mha is 1amp for 1 hour. that is how long the battery will provide 1 amp worth of energy. I would consider this rating useless as there is no energy draw stated for most electronics.
1442653
I do not know how many amps, it handles everything I plug into it, it work well!
1766893
It draws 0.6 amps, so that would be .6 amp-hours of battery capacity every hour.