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Can you use lithium cells in a 4sevens preon p1 and a0?

us Offline Lynn LeFey

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The title states it all.

I know some flashlights don't handle lithium cells, but I have no idea how to know if mine will.

Any help is appreciated.


us Offline Lynn LeFey

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Re: Can you use lithium cells in a 4sevens preon p1 and a0?
Reply #1 on: March 20, 2014, 05:05:30 PM
I have partially answered this for myself. The P0 and A0 cannot use a lithium cell.
http://www.candlepowerforums.com/vb/showthread.php?333255-Foursevens-Preon-P0-(XP-E-1xAAA-SS-quot-Flood-quot-)-Review-RUNTIMES-BEAMSHOTS-and-more!

Still looking for info on the P1, but I assume it's the same.


us Offline Lynn LeFey

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Re: Can you use lithium cells in a 4sevens preon p1 and a0?
Reply #2 on: March 20, 2014, 05:21:02 PM
Yes, i know I'm talking to myself at this point. :D

Okay, so now with manufacturer saying lithiums can destroy a light, the tester ran Energizer L92 Ultimate Lithium cells through the P0 with no ill effect. So...???

EDIT: Energizer Ultimate Lithiums are rated at 1.5v, within the range allowed by the specs by 4sevens, so I guess they're good to go?
« Last Edit: March 20, 2014, 05:23:30 PM by Lynn LeFey »


gb Offline Millhouse

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Re: Can you use lithium cells in a 4sevens preon p1 and a0?
Reply #3 on: March 20, 2014, 05:27:43 PM
The A0 has an input range of 1.0-1.5 volts, the P1 0.9-3.0 volts.

The lights should be ok with lithium primary, but not lithium ion rechargeables.
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hr Offline enki_ck

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Re: Can you use lithium cells in a 4sevens preon p1 and a0?
Reply #4 on: March 20, 2014, 07:14:09 PM
What Millhouse said. :tu:

Lithium primaries and Lithium-ion batteries are different beasts. The (Energizer) lithium AAA and AA batteries are like normal everyday batteries, just with a different chemistry in them that enables them to have a longer shelf life, larger capacity and provide a more consistent current. But once they are empty, that's it. The lithium-ions are rechargeable batteries that have a much higher voltage and would fry most everyday gadgets, even most flashlights, they are mainly used in bigger flashlights that can handle the voltage and heat generated.


us Offline Lynn LeFey

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Re: Can you use lithium cells in a 4sevens preon p1 and a0?
Reply #5 on: March 20, 2014, 07:15:35 PM
Ah. Now I see.

Thanks, from a flashlight noob.  :salute:


gb Offline Millhouse

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Re: Can you use lithium cells in a 4sevens preon p1 and a0?
Reply #6 on: March 20, 2014, 11:51:53 PM
Sorry, I should have expanded my answer a little more. As Enki has said, lithium primary are just like a normal battery that puts out 1.5 volts. Lithium rechargeable are typically 3.7 volts.
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