Re: [ot_caving] ultracapacitor flashlight
Here is another ultra-capacitor flashlight, apparently from the firm that created the energy storage technology. Lightning Flashlights or http://www.lightningflashlights.com/ The light is variable, and produced 200 lumen on high beam, but only runs at that capactiy for 25 minutes, then goes into low power mode for another 20 minutes. It lasts 90 minutes at standard beam, plus the 20 minute auto emergency level. However, I could find no price and when I followed the "partners" link to a retailer they were selling the "Light for Life" instead. Roger Moore In a message dated 11/12/08 19:11:57 Central Standard Time, pitboun...@gmail.com writes: Saw this flashlight on the Goat blog, Locklear would you please get one and write a review for us? Nico
Re: [ot_caving] ultracapacitor flashlight
"Ultracapacitors" are what's used in the shake and shine flashlights. Remember those? Maybe not so "ultra" - but a capacitor, neverthesless -WAV On Wed, Nov 12, 2008 at 7:35 PM, David wrote: > Nico, > > That post was the most interesting to ever appear on OT ( IMHO ). > > However, I always thought the problem with the ultra-capacitors was > size, and that the unit would never fit > into the housing of a flashlight. > > Let's hope it works and lets hope somebody builds a headlamp. > > > On a related note, > > Sports Authority is now selling a fully waterproof LED flashlight > suitable for mounting on the side of the helmet, > and suitable for all the extremes of wet caving - waterfalls, > whirlpools, duck-unders, rapids, etc.It was $ 58 > I think and not only is it a bright yellow neon color, but the > headpiece glows in the dark. Again, I ask, why > not in a headlamp? This is a new Pelican product. > > Academy is selling a frickin bright new T4 by Streamlight. It was > $ 80. It is probably too big to mount on > the side of a helmet, unless you are going to Golondrinas or Guaguas. > > > David Locklear > Fort Bend County Armchair Cavers Association ( FBACA ) > > - > Give this to a friend: ot-subscr...@texascavers.com > To unsubscribe, e-mail: ot-unsubscr...@texascavers.com > For additional commands, e-mail: ot-h...@texascavers.com > >
Re: [ot_caving] ultracapacitor flashlight
Advantages to Super Capacitors: 1. Can be used and recharged millions of time. 2.Low impedance - enhances load handling when put in paralleled with a battery. ( I think this means a flashlight could be designed to run longer with less batteries ) 3.Re-charge in seconds. 4.Simple charge methods - no full-charge detection is needed; no danger of overcharge. ( thus easier to charge in cigarette lighter, Right ? ) Limitations to Super Capacitors: 1.Linear discharge voltage prevents use of the full energy spectrum. ( I think this means LED light goes out immediately, instead of running dim for several hours ) 2.Low energy density - typically holds one-fifth to one-tenth the energy of an electrochemical battery. ( thus more bulky than a AA battery ) 3.Cells have low voltages - serial connections are needed to obtain higher voltages. Voltage balancing is required if more than threecapacitors are connected in series.( I think this means more of a problem with brighter LED lamps ) 4.High self-discharge - the rate is considerably higher than that of an electrochemical battery. ( thus not good for expedition trips underground ) - Give this to a friend: ot-subscr...@texascavers.com To unsubscribe, e-mail: ot-unsubscr...@texascavers.com For additional commands, e-mail: ot-h...@texascavers.com
Re: [ot_caving] ultracapacitor flashlight
Is the Ultracapitor similar to a fluxcapacitor? So if you get a lot of superbright LED's that are powered by a fluxcapacitor and get it to spin at a high velocity, will it make you A. Go back in time? B. Go forward in time? C. Smell like spent carbide as it heats up? D. Blow up in a microfarad implosion? - Original Message - From: "David" To: "Nico Escamilla" ; Sent: Wednesday, November 12, 2008 7:35 PM Subject: Re: [ot_caving] ultracapacitor flashlight > Nico, > > That post was the most interesting to ever appear on OT ( IMHO ). > > However, I always thought the problem with the ultra-capacitors was > size, and that the unit would never fit > into the housing of a flashlight. > > Let's hope it works and lets hope somebody builds a headlamp. > > > On a related note, > > Sports Authority is now selling a fully waterproof LED flashlight > suitable for mounting on the side of the helmet, > and suitable for all the extremes of wet caving - waterfalls, > whirlpools, duck-unders, rapids, etc.It was $ 58 > I think and not only is it a bright yellow neon color, but the > headpiece glows in the dark. Again, I ask, why > not in a headlamp? This is a new Pelican product. > > Academy is selling a frickin bright new T4 by Streamlight. It was > $ 80. It is probably too big to mount on > the side of a helmet, unless you are going to Golondrinas or Guaguas. > > > David Locklear > Fort Bend County Armchair Cavers Association ( FBACA ) > > - > Give this to a friend: ot-subscr...@texascavers.com > To unsubscribe, e-mail: ot-unsubscr...@texascavers.com > For additional commands, e-mail: ot-h...@texascavers.com > - Give this to a friend: ot-subscr...@texascavers.com To unsubscribe, e-mail: ot-unsubscr...@texascavers.com For additional commands, e-mail: ot-h...@texascavers.com
Re: [ot_caving] ultracapacitor flashlight
Nico, That post was the most interesting to ever appear on OT ( IMHO ). However, I always thought the problem with the ultra-capacitors was size, and that the unit would never fit into the housing of a flashlight. Let's hope it works and lets hope somebody builds a headlamp. On a related note, Sports Authority is now selling a fully waterproof LED flashlight suitable for mounting on the side of the helmet, and suitable for all the extremes of wet caving - waterfalls, whirlpools, duck-unders, rapids, etc.It was $ 58 I think and not only is it a bright yellow neon color, but the headpiece glows in the dark. Again, I ask, why not in a headlamp? This is a new Pelican product. Academy is selling a frickin bright new T4 by Streamlight. It was $ 80. It is probably too big to mount on the side of a helmet, unless you are going to Golondrinas or Guaguas. David Locklear Fort Bend County Armchair Cavers Association ( FBACA ) - Give this to a friend: ot-subscr...@texascavers.com To unsubscribe, e-mail: ot-unsubscr...@texascavers.com For additional commands, e-mail: ot-h...@texascavers.com
