a white LED typically sucks 20 mA at ~3V. Five LEDs at the same time means (5 x 20mA = 1000 mA or 1A) you are pulling ONE AMP out of those tiny batteries.
Wikipedia says alkaline AAs have a capacity of 1800 to 2600 mAh. dividing out the 'milli' means 1.8 to 2.6 amp hours. that means if you are pulling one amp, your batteries will be dead in 2 hours. C or D cells have the same voltage but much greater capacity (12000 to 18000 mAh or 12 to 18 Amp-hours for D cells) in a 'situation' you could always come up with a way (elegant or ugly) to wire up a compatible power-pack using different batteries
“white LED typically sucks 20 mA at ~3V. Five LEDs at the same time means (5 x 20mA = 1000 mA or 1A) you are pulling ONE AMP out of those tiny batteries.”
You mean FIFTY LEDs would consume power at the rate of one amp per hour lol.
Also, I
never get more than 1,500 mah out of AA alkalines at any useful discharge rate.