What type of motor and battery would I need to make a human-powered generator?


Posted March 7th, 2010 by admin 5 Comments »
battery
Patrick asked:


I had a 350W AC motor that did not work for this purpose. Do I need to have a DC motor? Also, what type of battery should I use? Obviously, it must be rechargeable so should I go with a lead-acid battery? This system will have a human-powered crankshaft, a motor, a battery, an inverter, and will need to produce 100W maximum to charge my laptop battery through the inverter.

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Posted in Engineering | 5 Comments »

Battery of my laptop suddenly goes from 97% charge to 4%.I was alerted to change to a new battery.Plz help?


Posted January 31st, 2009 by admin 5 Comments »
battery backup
kranthichand asked:


I dont know what actually happened.It was fine until sunday.But it radically changed.I was downloading a torrent and had to keep it plugged for around 10 nights.I used to shut it down in the mornings and leave for my college.I seriously have a problem as it doesnt give backup power any more.It gives a maximum backup of 1minute,unimaginabley down from 2:30hrs earlier.Its just 10 month old Dell XPS1530 piece.please help.What could be the problem???
Battery/Laptop/both??

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Posted in Laptops & Notebooks | 5 Comments »

I’m using Acer Aspire3002LMi, AMD processor. The bateery backup lasts only about 25 minutes?


Posted January 13th, 2009 by admin 1 Comment »
battery backup
gurpreet s asked:


Pls. help how can i increase the backup. I’ve tuned my system for the maximum battery backup already.

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Posted in Laptops & Notebooks | 1 Comment »