**Re: NITECORE EA4 PIONEER (cool white) review**
Here it is!

__Test: output versus runtime (28 Dec 12)__

So to recap, with Eneloop 2500mAh, I got a constant 45000 Lux for 1H 50mn, not quite the 2 hours but I personally thing this is pretty impressive,:twothumbs This is very well regulated and I think they have also got the heat dispersion well sorted with this one piece large head/ body.:thumbsup:

I am please with this, I may also do a test sometime on extra low (65 lumens) and have it running over night to see if I can get close to the 22h advertised!

Very nice runtime test. Most NiMH can charge to 1.47v without a problem to gain best capacity. In fact, the later Maha C9000 chargers typically terminate fast charge at a peak of 1.48v if they haven't hit the -delta V termination point (usually the 1.48v comes first). Then they do a top off charge at 100mA for 2 hrs. That's likely how Nitecore got their published runtimes on 2400 mAh cells.

A German flashlight forum did some comparable runtime tests too.

http://www.taschenlampen-forum.de/nitecore/20499-eindruecke-nitecore-ea4-nw-3.html#post264185
1. Eneloop XX with forced Turbo after every three minutes,

2. Turbo with Alkalines (why?),

3. Eneloop XX on Turbo with step down to Hi

**[dead on with 1hr 46min!]**
The cut and pasted Google translation is below:

To test the battery LSD cells were used by Sanyo, as alkalines batteries of AeroCell. The lamp was operated in the test runs at the brightest level and

__cooled by a fan__. Since the EA4 approximately

__every three minute__s in the second brightest mode switches in order to avoid an overheating of the LED, it

__was immediately after each downshifting cycled in the brightest level to verify the duration at maximum power__.

**Transit time batteries Sanyo Eneloop XX (2.400mAh):**
On power: 23,500 Lux

after 5 minutes: 23,100 Lux

after 10 minutes: 22,900 Lux

after 20 minutes: 22,700 Lux

after 30 minutes: 22,700 Lux

after 40 minutes: 22,600 Lux

After 50 minutes or 11,000 lux were displayed, removed the battery and measured with open circuit voltages of 1.05 to 0.97 volts - Test end.

Transit time AA alkaline:
On power: 23,500 Lux

after 5 minutes: 19,700 Lux

after 10 minutes: 17,300 Lux

after 20 minutes: 11,100 Lux

after 30 minutes: 2,000 lux

after 40 minutes: 1,400 lux

after 50 minutes: 1,100 Lux

I did not want to know more.

Finally, the lamp could compete with the Eneloop batteries again as they wanted - without having to be after the downshift switch back to peak performance. *(ie. letting Turbo step down to High)*

**Transit time batteries Sanyo Eneloop XX (2.400mAh):**

On power: 23,500 Lux

after 5 minutes: 14,300 Lux

after 10 minutes: 14,300 Lux

after 20 minutes: 14,300 Lux

after 30 minutes: 14,300 Lux

after 40 minutes: 14,300 Lux

after 50 minutes: 14,300 Lux

after 60 minutes: 14,300 Lux

after 70 minutes: 14,300 Lux

after 80 minutes: 14,400 Lux

after 90 minutes: 14,500 Lux

after 100 minutes: 14,600 Lux

After 106 minutes, the lamp began to darken. After 108 minutes or 7,000 lux were displayed, removed the battery and measured with open circuit voltages of 1.10 to 0.97 volts, the end of the test