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Apr 23, 2014 at 19:36 comment added Grant In addition, at 2A draw their voltage drops to 1.2V each within a few minutes. Now you only have 4.8V from 4 cells, so you are drawing closer to 2.5A. They don't even test their batteries at 2.5A, and those are high quality batteries. Lower quality dollar store types ones will be much, much worse.
Apr 23, 2014 at 18:14 vote accept Kamil
Apr 23, 2014 at 18:14 vote accept Kamil
Apr 23, 2014 at 18:14
Apr 23, 2014 at 17:51 comment added Kamil You are right. I just saw Duracell Procell D size battery datasheet. Looks like they have 3Ah at 1A discharge current. At 2A discharge their capacity drops terribly :(
Apr 23, 2014 at 17:46 comment added Kamil I need transformer, right?
Apr 23, 2014 at 17:44 comment added Kamil Wikipedia says, that Alkaline D have 12-18Ah capacity. In worst case - I will drain no more than 0.2C current. It's this really bad? And I will probably put 7-8 Watt lamp in there. 10W was just initial idea.
Apr 23, 2014 at 16:32 history answered Olin Lathrop CC BY-SA 3.0