Batteries

[jlfletc]

I just bought some Maha Rechargeable NiHm D cells. They are rated at 7500 mAh. Just for comparison, what is the mAh rating of a standard alkaline D Cell like an EverReady or a Duracell?

 

[Brock]

The typical D cell alkaline is rated about 18,000mA and a C cell is rated about 8,300mA. Hey who made that cool battery cheat sheet? Quickbeam? That is one of the pics we should put in an archive reference area.

 

[PeLu]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Brock:
The typical D cell alkaline is rated about 18,000mA and a C cell is rated about 8,300mA.<HR></BLOCKQUOTE>

But the rating is for very low currents. Using a D cell in a MaGlite with a 1A bulb will not give more than 8-9 Ah.
And D and C cells have a much worse high load behaviour than AA cells. Further the capacity is given to a discharge down to 0.6V/cell.

 

[jlfletc]

So, on average, the alkaline D cell will actually last longer than the NiHm D cell?

 

[Brock]

As PuLu noted it depends on the rate of ddrain on the battery. In the case of LED lights a alkaline cell should last longer. The alkaline cell can only be used once, unlkie NiMH which can be reused over and over.

 

[PeLu]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by jlfletc:
So, on average, the alkaline D cell will actually last longer than the NiHm D cell?<HR></BLOCKQUOTE>

Brock mentioned it before:
In a 'normal' flashlight with a 1A bulb they should behave about equal, maybe the NiMh cell lasting longer.