Testing mAh of a battery bank.

[silberdrachi]

I recently bought a rather large battery bank (http://www.amazon.com/gp/product/B00FDK2G2C/ref=oh_details_o06_s00_i02?ie=UTF8&psc=1) for a month long trip out of the country. I have been running it every day streaming video for at least 8-9 hours a day for 5 days now and it just hit 50% on the little lights, so i seem to be getting decent amounts of power out of it. Is there any way you guys know of testing the actual amount of power i can get out of it? Just to see if i am actually getting 22.4Ah?

 

Works great, and for the price i couldnt find anything better. But i just wondered if there is any way to verify the company's claim other than the fact it lasts a long time.

[79wjd]

See how many full charges you can get with the phone not being used and then find out the size of your phones battery.

[juretrn]

1 kmAh is called an Ah FYI.

You would basically have to test if it's capable of providing 1 A for 22.4 hours.

You need some sort of a load for that so it would be capable to stay at 1 A for that time...

But that is in the domain of specialized equipment. 

If I think of something I'll write it down.

[silberdrachi]

See how many full charges you can get with the phone not being used and then find out the size of your phones battery.

The problem is how long it takes me to drain my battery, i spent a long time messing with my n4 to make it use as little power as possible. So draining it actually takes some time even playing video. It would likely work, just hoped there would be another way since it will take so long.

 

 

1 kmAh is called an Ah FYI.

You would basically have to test if it's capable of providing 1 A for 22.4 hours.

You need some sort of a load for that so it would be capable to stay at 1 A for that time...

But that is in the domain of specialized equipment. 

If I think of something I'll write it down.

Whoops, forgot my physics and electronic classes. Somehow i totally missed my units.

 

I do think i have some stuff that i could rig together to make a constant draw, but maybe not at the rate of 1A for hours on end. Short of wiring up 16 or so LEDs into a micro-USB jack.

[juretrn]

The problem is how long it takes me to drain my battery, i spent a long time messing with my n4 to make it use as little power as possible. So draining it actually takes some time even playing video. It would likely work, just hoped there would be another way since it will take so long.

 

 

Whoops, forgot my physics and electronic classes. Somehow i totally missed my units.

 

I do think i have some stuff that i could rig together to make a constant draw, but maybe not at the rate of 1A for hours on end. Short of wiring up 16 or so LEDs into a micro-USB jack.

Don't forget a resistor or you'll burn all of them.

[79wjd]

The problem is how long it takes me to drain my battery, i spent a long time messing with my n4 to make it use as little power as possible. So draining it actually takes some time even playing video. It would likely work, just hoped there would be another way since it will take so long.

Whoops, forgot my physics and electronic classes. Somehow i totally missed my units.

I do think i have some stuff that i could rig together to make a constant draw, but maybe not at the rate of 1A for hours on end. Short of wiring up 16 or so LEDs into a micro-USB jack.

just set your phone aside. Drain it completely, then charge it off the battery bank. Then play movies while Bluetooth/wifi is on, browser and email constantly refreshing in the background, and anything else you can think of. When it dies, plug it in and repeat. Very simple, and can even be done over a couple days.

[juretrn]

just set your phone aside. Drain it completely, then charge it off the battery bank. Then play movies while Bluetooth/wifi is on, browser and email constantly refreshing in the background, and anything else you can think of. When it dies, plug it in and repeat. Very simple, and can even be done over a couple days.

It is so simple it is way TOO simple. Battery capacity of the phone might be +- 10% of what it's rated, and it will be charged once more and once less. Just not reliable enough for any kind of measurement. 

[silberdrachi]

Don't forget a resistor or you'll burn all of them.

 

yeah i just need to figure out if its even possible to get 1a draw using normal hobby LEDs. I think if i wanted to do that it would either need superbright LEDs with heatsinks, or it would take 100 hours to drain the battery.

[Hulk]

This?

 

https://www.kickstarter.com/projects/plxdevices/legion-meter-charge-your-smartphone-92-faster