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Wouldn't about 12kg of laptop batteries provide 4kW?( wikipedia: ~250-~340 W/kg ) Put them in a backpack.
by coder23 12y ago
Wouldn't about 12kg of laptop batteries provide 4kW?( wikipedia: ~250-~340 W/kg ) Put them in a backpack.
- Keyframe 12y agoWell, Osborne 1 was 10.7 kgs and it was considered a laptop, so there is that.
- seanmcdirmid 12y agoMy dad had one when I was a kid. They were called luggables, and weren't meant to be put on laps....
- Keyframe 12y agoWhat if you had really strong legs? You're right, of course.
- pflanze 12y agoOne of these would provide 4 kW, too (although I don't know for how long), and is only 5.8 kg: http://www.ev-power.eu/Winston-40Ah-200Ah/WB-LYP160AHA-LiFeYPO4-3-2V-160Ah.html http://www.ev-power.eu/Winston-40Ah-200Ah/WB-LYP160AHA-LiFeY...
- VLM 12y agoMy limited experience with lasers is the heatsink problem is significant, so worry about dissipating a couple KW of heat in your hand or backpack, not carrying around a mere couple KWh of energy. I imagine it would sound and feel much like holding an industrial heat gun for awhile. This might be a problem.
- Hello71 12y agoright; 40% efficiency means 40% comes out as light; the other 60% comes out as heat.
- Crito 12y agoHmm, now I'm imagining something like Reason (http://en.wikipedia.org/wiki/Snow_Crash#Reason http://en.wikipedia.org/wiki/Snow_Crash#Reason). A backpack sized battery, but needs a water-submersed heatsink.