CF 17mm 0.9V - 3.3V 4 Groups 2 to 5-Mode Boost Driver Circuit Board
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Input Voltage: 0.9V - 3.3V
Mode: Group 1 (By Default): Hi > Med > Lo > Str > SOS Group 2: Hi > Lo > Str Group 3: Lo > Med > Hi Group 4: Hi > Med
For the configuration, please refer to the product picture.
Battery Config.: 1 x AA / 2 x AA
Output Current: Hi 3V : 2000mA
Med 3V : 500mA
Lo 3V : 150mA
Hi 1.5V : 1950mA
Med 1.5V : 579mA
Lo 1.5V : 146mA
(Testing is by DC Power Supply with Cree XM-L2 LED)
Features: 1. Constant Current
Dimension: 17mm(Dia.) x 1.6mm(Thickness)(including all Electronic Component)
1 x Driver Circuit Board
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Strengths:Good support for both eneloop and cr123a. Quite bright. Draws 2a on high from a cr123a, 550mah on medium, and 170 on low. Good mode choice. Fits most flashlights.
Weaknesses:Bad pwm. One of the lowest frequencies I've ever seen on the lowest mode.
Summary:A decent driver, with good mode choices, as long as you're not sensitive to pwm as it's very low frequency.