Package Content:

- 20pcs 4 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")

- 4 x AMC7135

- Resistors

- 1400mAh 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 1050mA, connect both 1&2 and 3&4 to get 1400mA, default at 700mA.

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 runtim