KDOG3
Flashlight Enthusiast
I've always wondered why there aren't 17670/18650 sized batts that are 6v for 2x123a lights. Seems like they would be perfect for lights like the LX2, 6P etc...
Why no 6V 17670s?
- Thread starter KDOG3
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SilentK
Enlightened
Do you mean rechargables or a primary? i could see it working with a primary, but you would need some kind of circuitry for li-ion to decreaces the voltage. i think it might be a good idea though. either way
rmteo
Flashlight Enthusiast
Titanium Innovations CR123A 3V Lithium Photo Battery 1400mah (Double Pack 6V)
http://www.batteryjunction.com/titanium-cr123a-double.html
http://www.batteryjunction.com/titanium-cr123a-double.html
Basically Li-Ion/Po batteries dont like to be either over or under charged by as much as 1%. In other words: They are individuals.
Put 2 togheter and over time one will sag behind and die, unless You involve some sort of ballancing plug.
Therefore You only see LiPo's in series with ballancing plugs and that defies the vhole purpose of 2 cells as one unit :shrug:
Put 2 togheter and over time one will sag behind and die, unless You involve some sort of ballancing plug.
Therefore You only see LiPo's in series with ballancing plugs and that defies the vhole purpose of 2 cells as one unit :shrug:
lolzertank
Enlightened
Well, you could integrate the balancing circuit into the protection circuitry for the cells. That would be quite difficult and expensive though.
Last edited:
mdocod
Flashaholic
When designing a battery, there are goals in mind... Things like energy density per weight and volume, safety, reliability, storage life, power density, internal resistance, etc.
Scientists will tinker for years to reach certain goals. Voltage is actually pretty low on the list of goals because devices can be designed around different voltages, and more importantly, WILL BE if the new chemistry is worth designing a product around.
Products are designed around batteries, not the other way around. 3.7V lithium cobalt cells, were designed to have the highest possible energy density for portable electronics. Laptops primarily. The resulting voltage of the cell chemistry is more happenstance and result of the best possible combination of materials they could come up with. The person who decided to put the lithium cobalt chemistry into a 17mm by 67mm cylindrical can probably wasn't even aware of the possibility that someone might someday slap it in an aluminum tube to power a flashlight.
The point is, nobody is going to fund a decade long research project to discover a chemical combination that produces ~6V for the sole purpose of replacing a pair of 3V lithium primary cells for a few flashlight enthusiasts.
sorry
-Eric
Scientists will tinker for years to reach certain goals. Voltage is actually pretty low on the list of goals because devices can be designed around different voltages, and more importantly, WILL BE if the new chemistry is worth designing a product around.
Products are designed around batteries, not the other way around. 3.7V lithium cobalt cells, were designed to have the highest possible energy density for portable electronics. Laptops primarily. The resulting voltage of the cell chemistry is more happenstance and result of the best possible combination of materials they could come up with. The person who decided to put the lithium cobalt chemistry into a 17mm by 67mm cylindrical can probably wasn't even aware of the possibility that someone might someday slap it in an aluminum tube to power a flashlight.
The point is, nobody is going to fund a decade long research project to discover a chemical combination that produces ~6V for the sole purpose of replacing a pair of 3V lithium primary cells for a few flashlight enthusiasts.
sorry
-Eric
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