Package Content:

- 20pcs  3 x AMC7135 Circuit Board

- Included two 1" wire (black/red) for EACH circuit board

Product Specifications:

- mini PCB board (thumb size) (diameter: 17mm / 0.668")

- 3 x AMC7135

- Resistors

- 1050mAh regulated output

- Maximum 3.5V output

- N4148 batch wiring

- This board works best with LED bulb that consume less than 3.7V

- See pictures: connect 1&2 to get 700mA, connect 1&2 plus 3&4 to get 1050mA, default at 350mA, customizable low/middle/high switch with resistor switch

Both 2xCR123A Lithum cell and 1x18650 cell gives 110-120 lumens (tested), light last about 3 hours+ for 18650 and less for 2xCR123A. The excellent AMC7135 performer provides 100ish lumens for the long and durable regulated runtime.