Surefire Cree E1L and E2L current consumption comparisons

[parnass]

To get an idea of battery life, I measured the battery current drawn by my Surefire Cree E1L and E2L flashlights. I powered them with Surefire 123A batteries:

 46 mA - E1L dual level - 3 lumen setting
348 mA - E1L dual level - 45 lumen setting

198 mA - E1L single level - 30 lumen setting

152 mA - E2L single level - 45 lumen setting

I do not own a dual level E2L Cree flashlight.

 

[tvodrd]

On my old Fluke 73- 2 digs resolution, I get 40mA on low and 330mA on hi on my E1L. For s&g's checked the E1B and got 40/760mA. Does the output drop to an actual 45 Lm after 8 hours on a 1300mAH 123A?

Larry

 

[tussery]

I am measuring 16mA low and 266mA high on my dual mode KX2.

 

[hayhay]

So what kind of runtimes does that project for the E1l dual level??

 

[tvodrd]

The paperwork that came in the E1L's package says 8.5 hours for hi and 48 hours on low. My light's head is marked KX1 with its own serial number which doesn't match the one on the body.

"Each flashlight features digital current regulation that matches the LED's current requirements to the batteries' output to achieve a consistent level of light output for the useable life of the batteries." (From the included paperwork which is for the E1L and E2L lights.)

The runtime numbers are pretty interesting for a 1300mAH cell. :green: Only an instrumented brightness/runtime test will illuminate reality.

Larry

 

[regulator]

Given the capacity of a CR123 of 1300 - 1500 mAh's, the E1L should get close to 4 hours at regulated output. The 8.5 hours must be at significatly reduced output. I wonder if the E1L has flat regulation or slowly declining output on high? I would love to see a runtime test.