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Re: Ultracapacitor Flashlight Recharges In 90 Seconds

r4nd0mn4me — Sun, 03 May 2009 11:16:55 -0000

My avast antivirus has detected a Trojan horse in the file http://www.ohgizmo.com/2008... called JS:ScriptPE-inf [Trj] ...has anyone else got this warning from this site or is it just a false positive?

Re: Ultracapacitor Flashlight Recharges In 90 Seconds

Evan Ackerman — Mon, 10 Nov 2008 18:20:27 -0000

Yeah, there are certainly downsides, which is why (despite the obvious advantages) we're not seeing them in more places. But, as with any other emerging tech, I'm optimistic that they'll be getting faster + better +smaller + cheaper in accordance with Moore's law :)

Re: Ultracapacitor Flashlight Recharges In 90 Seconds

ad_verb — Mon, 10 Nov 2008 09:41:33 -0000

Capacitors have far less, well, capacity than batteries. Here's the math: A typical AAA NiMH rechargable has 850 mAH (milliamp hours), so that means it can put out about 1 amp of current for 1 hour at 1.5 volts

For capacitors, farad = (amp * second ) / volts. Sooo, if you have a 1 farad capacitor, charged to 1 volt, that means you can put out 1 amp for 1 second. It would take 3,600 of those to do 1 AH.