"Heterodyne" wrote:

An educated guess would be NiCad's. 1500 = mah (milliamp/hours) Same for
the 2500mah. Obviously the 2500 hold a charge longer.

Not 1500 mA/h, but 1500 mA*h or 1500 mC (millicoulomb).

Suppose a capacity of 2500 mAh,
then the product of current and time equals 2500 mAh.
So, if your device draws a current of 250 mA, it will work for 10 h
(250*10 mA*h = 2500 mAh).

With a current of 2,5 A it should function for 1,0 h;
in practice the run-time is shorter...

Hein





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