Explain Amp-Hours to me please.

[Justin]

I have a Makita drill set that has a 3.0 aH battery and I just bought one that has a 1.5 aH battery.

I know(think) that is has to do with duration or longevity of the battery under full load but I'm clueless after that.

I was also told that it was the duration the battery could last under full load. So the 3.0 would last 3 hours under full load and the 1.5 would last an hour an a half under full load.


Anyone care to clear it up for me?

 

[flight doc89]

shows how long the battery can supply a certain current; ie, how much juice is in the battery.

theoretically, a 5 aH battery could supply a 1 amp current for 5 hours, or a 5 amp current for 1 hour, at a defined voltage.

If I am mistaken, someone correct me.

 

[drunk_medic]

Remember, look how much of a load [amperage] the drill actually eats, and keep in mind that these are just numbers so you aren't disappointed. Heh.

 

[Isphius]

flight doc got it, but im sure the drill can use a lot of amps. I think RC car motors are similar in size/power and can draw 30-40 amps