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  • How to build an insanely bright LED flashlight!

    I got the price down to less than 75 CN dollars after about 15 minutes research on eBay, including a balance charger and mid range LiPo battery specified (but I already have those last two and an old heatsink which takes 35 CN dollars off the cost so components cost around 40 CN dollars or about 30 US dollars). I don't call that too expensive

    not if you get the bits from China via eBay rather than Amazon - much cheaper - and most of us have the odd LiPo and charger around to use with drones and other stuff.

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