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FrozenGate by Avery

A thread about voltage

Accutronitis said:
a battery which is rated at Ni-Cd 3.6V 1.8Ah...
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If it's older than a few months, it will be quite a bit lower than 1.8Ah. Any NiCd cell older than a few years will have capacity of near zero. NiCd is in no way superior to modern battery technologies. Nobody uses them any more because they're garbage.
 





Heck I can replace the Ni-Cd with 2 18650 3.7V 9900mAh Li-ion for cheap ! That should be able to power a monster laser shouldn't it ?

That would be 7.4V 9900mAh power to run the laser, is there anything better than that in a comparable size setup ?
 
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Accutronitis said:
Heck I can replace the Ni-Cd with 2 18650 3.7V 9900mAh Li-ion for cheap ! That should be able to power a monster laser shouldn't it ?
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There aren't any 9000mah 18650's. 3500mah max. LG Sanyo and Panasonic. There are only a few actual manufactures of these batteries. Outside of them are just rewraps that use one reason or another to make a claim.
 
The space I have for batteries is appox 127mm X 23mm do any killer batteries that could fit that space come to mind with anybody ?
 
Accutronitis said:
I can believe that The very light Li-Ion batteries (2 cells) on the right have more capacity than the Ni-Cd battery (3 cells) on the left ? Is that correct ?!?



How can that be ?

If there is no mistake and the 2 batteries on the right are that much better than the 3 on the left i'll find Li-Ion cells that will fit in the same space as the Ni-Cd's did !
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Actually, Each of the lithium cells pictured should have about the same storage capacity as all 3 of the NiMH cells combined. A lithium ion cell puts out 3 times the voltage as a NiMH cell.
 
Hey I can fit 2 ea 26650 Li-Ion batteries in place of the Ni-Cd, Anything I should know about buying no BS 26650 Li-Ion batteries
 
WizardG said:
Actually, Each of the lithium cells pictured should have about the same storage capacity as all 3 of the NiMH cells combined. A lithium ion cell puts out 3 times the voltage as a NiMH cell.
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And at a fraction of the weight !

I hadn't realized battery tech had progressed as much as it has !
 
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Think of voltage like a water pipe. The speed of the water through the pipe represents the current or Amperage. The amount of water flowing through the pipe represents the voltage.
 
Well I do know this I know this, The way in which the laser power output drops does not suggest a battery issue IMHO....
 
HydroSean said:
Think of voltage like a water pipe. The speed of the water through the pipe represents the current or Amperage. The amount of water flowing through the pipe represents the voltage.
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Your first part is correct, the second part isn't. Voltage is more akin to water pressure in your analogy.
 
diachi said:
Your first part is correct, the second part isn't. Voltage is more akin to water pressure in your analogy.
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I like the plumbing analogy. The diode is a backflow check valve and the voltage is the pressure required to open the check valve and amperage is the measure of volume that passes through the valve. Am I right?
 
Does the analogy work for pentodes, magnetrons, vacuum fluorescent displays, numitrons, pressure transducers, and negative temperature coefficient thermistors? :na:
 
Cyparagon said:
Does the analogy work for pentodes, magnetrons, vacuum fluorescent displays, numitrons, pressure transducers, and negative temperature coefficient thermistors? :na:
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It works for all kinds of big words like that :crackup:
 
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