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06/09/2006 06:53:00 PM · #1 |
| Soon at a store near you thanks to nanotechnology...A Battery that charges within seconds. |
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06/09/2006 07:00:53 PM · #2 |
rather have one that doesn't need to be replaced, but if we can get both that would really help our fragile envirnoment
interesting ideas those |
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06/09/2006 07:28:57 PM · #3 |
"Within seconds" better be a euphemism! I saw the link on DPReview over lunch today, and did a quick calculation. In order to charge a 7.4V, 1400mAh battery (very typical capacity for a camera) in 10 seconds, you'd need to pass 500 amperes of current!! At 90% conversion efficiency (overly optimistic), that means you'd need to draw 35A from the household line (assuming 120VAC supply as in North America). You'd need to go to a 220V, dedicated line just for your battery charger, LOL.
At 100 seconds, you'd still need a charger capable of sustaining a 50A output at the battery voltage. That's a *big* charger.
Edit: Also, such a capacitor/battery would need darn good current limiting on the output to avoid danger of physical injury to the user.
Message edited by author 2006-06-09 19:30:19. |
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06/09/2006 07:32:49 PM · #4 |
Are we as a society in that much of a hurry that we really need a battery to charge that fast? I have a charger that charges batteries in 15 minutes. I thought I was being a bit impatient feeling the need for that.
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06/09/2006 07:35:49 PM · #5 |
| I think the larger potential benefit of this technology is the extremely long life. A capacitor can be charged/discharged millions of times, as compared to 500-1000 max. for today's rechargable batteries. Both from a total cost and environmental aspect, this is a great benefit. It also holds the promise of perhaps less hazardous/toxic material per cell than a chemical battery. |
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06/09/2006 07:35:52 PM · #6 |
Originally posted by kirbic:
Edit: Also, such a capacitor/battery would need darn good current limiting on the output to avoid danger of physical injury to the user. |
OMG yes. Anyone who's ever been popped by a capaciter in a flash would tell you that. IT HOITS!
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