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General Gear Discussion The General Gear Discussion forum is for the discussion of traditional and lightweight (ultralight) backpacking gear that is not covered in other Practical Backpacking™ forums. [Please post about Backpacks, Shelters, Sleeping Gear, Backcountry Kitchen (Food, Stoves) in those respective forum areas.]


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Old 11-28-2008, 05:59 PM
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atraildreamer atraildreamer is offline
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Join Date: Apr 2006
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Lightbulb Rotate your LED Flashlight Batteries

My wife asked me to check the batteries in her LED headlamp as it was starting to dim out in use. The battery pack is the cylindrical type common to LED lights and uses 3 AAA batteries.

I tested the batteries and found that 2 were near full charge, while the third battery was totally dead. This seems to be a common problem with this type of light.

The obvious way to maximize battery life would be to periodically rotate the position of the batteries in the battery pack and allow the draw down of each battery to be equalized thru the life of the battery(s).

Just my 2 cents worth.
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Old 12-02-2008, 02:06 PM
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SSDD SSDD is offline
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Thanks I will keep an eye on the Batt's




Travis
  #3  
Old 12-13-2008, 11:20 AM
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atraildreamer atraildreamer is offline
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Lightbulb Possible reason?

I got some lively discussion and replies to this problem on some other forums.

The most reasonable explanation offered was that eventually, one of the 3 batteries will start to die before the other two. This is due to minor differences that exist in every battery, even those manufactured at the same time. The two remaining batteries will then reverse charge the third battery until it is dead. This causes the dimming of the output from the LED light, as now there is only 2/3 of the power available to power the light circuit.

I suppose you could save the two remaining batteries and pair them up with another battery with a similar level of charge and use them up that way.
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