Please forward this to anyone you know who is interested in new headlamp technology:
Here is a Li-ion battery pack that you could easily mount to the back of a helmet: http://www.powerstream.com/z/LL12.jpg It sells for $ 37.50 and is rated for 6000 mAH. It weighs 240 grams. ( I believe a D cell alkaline weighs about 306 grams ) It is 3.7 volts. ( I have no idea what I am talking about here, but I believe that headlamps using 3 AAA or AA batteries are rated at 4.5 volt ) And aren't LED's around 3.6 voltage? They sell a slightly bigger one that is 306 grams at 8000 mAH. The advantage to building a headlamp with this battery ( in my opinion ) is less weight, longer run-time - both of which are good ideas for a caving headlamp. What would happen if I connected this battery to the headpiece of my old Wheatlamp? The 4 volt bulb should work, right? The same would apply to the Petzl Zoom, right? I am assuming that the brightness will be slightly dimmer. Is this correct? David Locklear _______________________________________________ Texascavers mailing list [email protected] http://texascavers.com/mailman/listinfo/texascavers_texascavers.com
