World’s fastest battery packs?

From what I have been taught about charging batteries; the quicker the a battery is charged the shorter the lifespan of that battery, The slower the charge the longer that battery's lifespan.

Sounds like a great option for "road warriors" who use their devices constantly. A short battery life span is likely a very minor concern when in desperate need of power for devices…

+1 This would be really usefully transiting airports as well.

So the charger must be putting out around 8 amps.
Must be a weighty and large charger.

It depends on the battery. There are many different battery chemistries in the lithium ion family.

You are correct in a sense though. The chemistries that charger faster and have a higher draw rating are also lower capacity per gram.

IMR and ICR are two of the more popular Li ion chemistries right now. One has storage one has speed.

They're getting better rapidly though. Battery technology is developing more in 6 months currently than it did from the 70's to early 90's

Just buy the best battery to meet your needs and a year later do it again. Don't worry about research and everything because they're changing as rapidly as computers and phones. They have maybe 18 month shelf life anyway regardless of how dated they become in short time.

If you need a fast battery you'll carry a little more weight for the speed if all else is equal. That's the thing to remember.

I'm a huge fan of the flamestower for keeping batteries going on the trail and also a fan of simply carrying a heavier battery if small fire isn't an option. For 10 ounces you can either charge batteries every night on the flamestower or you can simply carry a lot of battery lol.

I see no benefit to carrying a high drain low capacity battery and heavy 10 amp wall charger though personally. Unless you're really really pressed for time and find 2 amp USB charging inadequate to meet your goals.

You are confusing output and input. It recharges itself in 15 minutes off of an outlet (110 V). It would only need 1/2 amp to get to 2000mAh (@5 volts), but with inefficiencies I am guessing it draws closer to an amp.

Interesting that their website posts charging cycles for their regular battery packs and cases but not the high speed charging ones…

http://www.myunu.com/ultrapak-go-battery-pack.html under FAQs:

6. How many charging cycles does the Ultrapak have?
A: The uNu Ultrapak generally yields 500 charging cycles in its lifetime.

More on how they charge faster – a combination of battery chemistry, and parallel charging: http://www.myunu.com/what-is-ultrax

— Rex

There was a news story here in SV the other night. This company's warehouse was burglarized and most of their inventory was stolen.

Shipments might be delayed.

So they use a high input charger with a battery chemistry that will survive the amps. One drawback is the 500 charge cycles is much less than what is spec'd for some other common lithium chemistries. Still though, I think this battery pack would have its uses.

Ryan

This company's warehouse was burglarized and most of their inventory was stolen.

And the marketing spin posted on their web site:

Due to extreme demand, Ultrapak Go will be shipped on August 25th, 2014

Burglary = extreme demand. Hilarious.

— Rex

"You are confusing output and input. It recharges itself in 15 minutes off of an outlet (110 V). It would only need 1/2 amp to get to 2000mAh (@5 volts), but with inefficiencies I am guessing it draws closer to an amp."

No confusion.

You need to put 2 amps into the pack in 15 mins.
That will require a 8 amps from the charger

"I'm a huge fan of the flamestower for keeping batteries going on the trail and also a fan of simply carrying a heavier battery if small fire isn't an option. For 10 ounces you can either charge batteries every night on the flamestower or you can simply carry a lot of battery lol."

At 2.5 watts output you will need to keep the fire going for a loooonggggg time.

My S4 battery is 2800mAh, at 2.5 watts that'll need around 5 hours to charge :o

Lets say you don't use a full charge, that's still means having to supply wood for around 3 hours each day.
Imagine if every hiker had a fire burning every night for 3 hours, there would be no trees left.

Not a great solution IMO