WH, AH , V
I would like to understand how to read those numbers and see how many times a power bank charger can recharge my phone or laptop.
In: 0
Forget the H for now.
Imagine electrons in a wire are like guys in an obstacle course. V for voltage is how much energy each guy has. This is what they use to push through obstacles, maybe jumping over fences (arcing across gaps), pushing through turnstiles (actually making the appliance work), or just slogging through the mud (moving along the wire). I is the current. It’s usually measured in voltage, which is just joules (energy) per coulomb (charge), or energy per guy. A is just a measure of current (I), how many guys go past a checkpoint in a given amount of time. It stands for Amperes, and is just coulomb’s per second (guys per second). W is Watts, and is a unit of power. It’s energy per second, which is really just the number of guys per second times the energy of each guy. It’s how much energy you’re getting from that turnstile they’re pushing through every second.
All that AH is is amp hours. It means how many hours worth of that rate of runners do you have. Then WH is the same, but for the rate of energy (i.e. the current times the voltage). 2000AH means you could run at 1A for 2000 hours or at 2000A for 1 hour, or anything in between! As long as the two numbers multiply to 2000.
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