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I want to add a waterproof LED light to my bike with an an on/off switch and a rechargeable battery to power the battery Answered

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frollard
frollard

Answer 8 years ago

as always;
+1...

if you don't want to build one, they can be had from the internet for 'cheap' (20-200 dollars depending on power and features, batteries included with charger).

Build it yourself will cost (sadly) more than just buying one in most cases (since waterproof = important).