Slashdot Mirror

← Back to Stories (view on slashdot.org)

Recharge Batteries in 30 Secs

Posted by CmdrTaco on from the i'll-believe-it-when-i-see-it dept.

An anonymous reader writes "NEC has developed organic radical batteries which are recharged in 30 seconds. Good news, they won't (probably) cost more than the current NIMH batteries." Why is it that I'm not holding my breath to have this technology in a laptop?

4 of 423 comments (clear)

  1. Conversion ratio? by TheDigitalOne · · Score: 5, Insightful

    Unless they have a 100% conversion of source electricity to storage these batteries are going to have very limited capacities. Imagine how much heat a 1200mAh battery would give off if only 90% of the charge is actually stored and the rest goes to waste heat during that 30 second charge cycle.

  2. Re:Heat by lcsjk · · Score: 5, Insightful

    You're right. I should stop there to be funny, but since you mentioned it, the battery heat is due to the internal resistance of the battery. If it is low, the power (current squared times resistance) will be low. Note that the article ended with reference to being able to limit the current from the battery, and that makes me think the internal resistance is low, and therefore, low charge/discharge power for heating.

  3. perhaps you assume too much by way2trivial · · Score: 5, Insightful
    it does not say it uses electricity to recharge.

    perhaps a 30 second recharge means, opening a cap, dumping the contents, and refilling it.. (no heat involved)

    note the words organic and resin

    --
    every day http://en.wikipedia.org/wiki/Special:Random
  4. Re:Moore's Law? by robslimo · · Score: 5, Insightful

    Look again. 2.5V, 3906 W/kg, 20A rated.

    And look at this one, 2,600 Farads, 2.5V, 600A rated (not a D cell package though).