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Author Topic: USB battery  (Read 9017 times)

viridius

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Re: USB battery
« Reply #40 on: October 20, 2005, 08:17:56 PM »

Don't worry, i don't have a safe means of remote detonation

Wait...what?
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Firespark

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Re: USB battery
« Reply #41 on: October 20, 2005, 08:28:39 PM »

Yah, it occoured to me later that might be confusing, I meant it as such: I'm not stupid enough to do it in a way i deem unsafe, and I have no such way, so I won't do it.

Sorry :P

Any thoughts on the cells-in-parallel plan though?
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viridius

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Re: USB battery
« Reply #42 on: October 20, 2005, 08:53:36 PM »

That circuit is designed for a specific battery and as such, I cannot recommend its use.
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Firespark

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Re: USB battery
« Reply #43 on: October 20, 2005, 09:33:02 PM »

Here's an interesting question though: It's designed to work with "2 model 18650 cells". There is a page on that site with many different 18650 cells, all 3.6V, but differing in mAh. I was planning on using those 18650's anyway (as they are the proper cells for the application, regardless of board used, for sheer spec sake), but if the current rating mattered to that circuit, it would have to specify a type of 18650- any one of the 2400, 2200, or 2000 mah varieties. In theory, wouldnt using 2 parallel 18650s in place of one just cause the circuit to function exactly the same, except take roughly twice as long to discharge and charge in the same environment as a cingle cell/socket counterpart?

EDIT (well actually i could never post to begin with, connection died):

I can't tel based on the datasheet they supply for that pcb weather it would care about the mA difference, but they DO endorse wiring 2 full modules in parallel AFTER the protection circuits to achieve a doubled effect, and I guess that for the extra 4 bucks, and added convienience of scalability, it's not such an issue.
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trials_modder

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Re: USB battery
« Reply #44 on: October 22, 2005, 11:45:33 AM »

So those two NiMH phone battery packs will work? I'm then stuck with the problem as to how to charge those packs.
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linear

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Re: USB battery
« Reply #45 on: October 24, 2005, 09:11:19 PM »

<not sarcastic>I have an old phone that I use to charge mine up</not sarcastic>
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i7dude

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Re: USB battery
« Reply #46 on: October 25, 2005, 08:27:29 AM »

man, reading this thread is kind of like watching a novice camper try to feed a kodiak a snickers...just buy the damn charger.

dude.
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BalefireX

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Re: USB battery
« Reply #47 on: October 25, 2005, 08:52:59 AM »

man, reading this thread is kind of like watching a novice camper try to feed a kodiak a snickers...just buy the damn charger.

dude.

I love i7dude
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l0cke

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Re: USB battery
« Reply #48 on: December 18, 2005, 04:38:21 PM »

IF you want another solution, try this
http://hackaday.com/entry/1234000383070996/
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viridius

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Re: USB battery
« Reply #49 on: December 18, 2005, 04:53:20 PM »

Interesting, but the 31 joules in that capacitor aren't enough to run a USB player for long.  This thread will now be locked to prevent thread resurrection related flaming.
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