Comments on: Power on the Go! http://mlearning.edublogs.org/2007/09/05/power-on-the-go/ An Online Reflective Journal on Mobile Learning Practice Wed, 23 Jun 2010 07:07:09 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: James Clay http://mlearning.edublogs.org/2007/09/05/power-on-the-go/comment-page-1/#comment-8010 James Clay Sat, 08 Sep 2007 17:47:11 +0000 http://mlearning.edublogs.org/2007/09/05/power-on-the-go/#comment-8010 How about a Kwik-E-Charge - phone-charging pod? http://www.shinyshiny.tv/2006/01/ces_2006_kwikec.html <i>These chargepods are popping up all over the Far East, where battery-challenged folk can hook up their phone (or laptop, PDA, digital camera etc), insert a coin and fill the dead gizmo with life. It's basically a petrol pump for gadgets.</i> How about a Kwik-E-Charge – phone-charging pod?

http://www.shinyshiny.tv/2006/01/ces_2006_kwikec.html

These chargepods are popping up all over the Far East, where battery-challenged folk can hook up their phone (or laptop, PDA, digital camera etc), insert a coin and fill the dead gizmo with life. It’s basically a petrol pump for gadgets.

]]> By: Steve Wheeler http://mlearning.edublogs.org/2007/09/05/power-on-the-go/comment-page-1/#comment-8008 Steve Wheeler Fri, 07 Sep 2007 11:47:47 +0000 http://mlearning.edublogs.org/2007/09/05/power-on-the-go/#comment-8008 This is really useful information Leonard. Seems like an old solution - I remember the days (sounding ancient now...) when videocamera users had to wear battery belts... At least battery technology has moved on and economies of scale mean they are fairly cheap as well as small. Good blog mate! This is really useful information Leonard. Seems like an old solution – I remember the days (sounding ancient now…) when videocamera users had to wear battery belts… At least battery technology has moved on and economies of scale mean they are fairly cheap as well as small. Good blog mate!

]]> By: Martin http://mlearning.edublogs.org/2007/09/05/power-on-the-go/comment-page-1/#comment-7995 Martin Wed, 05 Sep 2007 18:14:28 +0000 http://mlearning.edublogs.org/2007/09/05/power-on-the-go/#comment-7995 thanks for the hints .. i have already ordered it to provide my nokia n96 with more engergy :-) .. nice greetings from austria thanks for the hints .. i have already ordered it to provide my nokia n96 with more engergy :-) ..

nice greetings from austria

]]> By: Leonard Low http://mlearning.edublogs.org/2007/09/05/power-on-the-go/comment-page-1/#comment-7994 Leonard Low Tue, 04 Sep 2007 23:09:04 +0000 http://mlearning.edublogs.org/2007/09/05/power-on-the-go/#comment-7994 Indeed - supercapacitor technology is making good inroads towards providing high capacity portable power supplies. Unfortunately, there are just a couple of hurdles still to cross before supercapactitor technology becomes useful as a portable power supply. One is energy density: in a super/ultracapacitor, the amount of energy stored per unit weight is considerably lower than that of an electrochemical battery (3-5 Wh/kg for an ultracapacitor compared to 30-40 Wh/kg for a battery). Furthermore, current super/ultracapcitors are useful for high rates of charge/discharge, but less useful for providing sustained power. Basically, supercapacitors are good as a temporary storage of high power, but seem less useful in situations where a sustained current is required, in the absence of intermittent recharging. However, if these technical obstacles can be overcome, one of the huge benefits of supercapacitors is that they can be recharged very, very quickly indeed. One day, recharging a mobile device to full capacity may take seconds, rather than hours as it often does today! Indeed – supercapacitor technology is making good inroads towards providing high capacity portable power supplies.

Unfortunately, there are just a couple of hurdles still to cross before supercapactitor technology becomes useful as a portable power supply. One is energy density: in a super/ultracapacitor, the amount of energy stored per unit weight is considerably lower than that of an electrochemical battery (3-5 Wh/kg for an ultracapacitor compared to 30-40 Wh/kg for a battery).

Furthermore, current super/ultracapcitors are useful for high rates of charge/discharge, but less useful for providing sustained power. Basically, supercapacitors are good as a temporary storage of high power, but seem less useful in situations where a sustained current is required, in the absence of intermittent recharging.

However, if these technical obstacles can be overcome, one of the huge benefits of supercapacitors is that they can be recharged very, very quickly indeed. One day, recharging a mobile device to full capacity may take seconds, rather than hours as it often does today!

]]> By: Bengt http://mlearning.edublogs.org/2007/09/05/power-on-the-go/comment-page-1/#comment-7993 Bengt Tue, 04 Sep 2007 21:32:24 +0000 http://mlearning.edublogs.org/2007/09/05/power-on-the-go/#comment-7993 Probably there will be supercapacitators for smaller use than cars maybe.... http://en.wikipedia.org/wiki/Supercapacitor Probably there will be supercapacitators for smaller use than cars maybe….
http://en.wikipedia.org/wiki/Supercapacitor

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