I’m building a 5W handheld laser and the only power supplys I have found that will work with the diode require a 12 V input. First of all, would it be practical to use a 18650 battery (would the battery life be short) and if so where can I find a 5W power supply that will work with 3.7 V. Attached are pictures of the diode and the type of power supply that I found. The diode can’t handle >4A. Thanks in advance!
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