Fenix L2D & P3D

I currently have a Fenix L2D Q5. Do you guys agree that besides it takes a different battery type it's almost the same light? I was thinking about getting a good quality light that takes RCR123A without any issues. But the more I think about it, the more I think I am getting a 'duplicate' light.

What do you guys think?

If your talking about output then you may not see a difference, its the size that's different its more pocket frendly IMO. The P3D Q5 also handles 3.7v RCR123 batteries without any problems.

L2D head uses a boost circuit. P3D head uses a buck circuit. L2D head is the same as the P2D head. They're not "duplicates", but pretty close. It depends on what batteries you plan on using.

kavvika said:

L2D head uses a boost circuit. P3D head uses a buck circuit. L2D head is the same as the P2D head. They're not "duplicates", but pretty close. It depends on what batteries you plan on using.

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What is boost and buck circuit?

lengendcpf said:

What is boost and buck circuit?

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Boost increases the voltage from the batteries to get the output. Buck decreases the voltage from the batteries to get the output.

Stereodude said:

Boost increases the voltage from the batteries to get the output. Buck decreases the voltage from the batteries to get the output.

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Thanks for enlightening. cheers..

Stereodude said:

Boost increases the voltage from the batteries to get the output. Buck decreases the voltage from the batteries to get the output.

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Which is more eficient?

LightWalker said:

Which is more eficient?

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That depends on a lot of factors. Generally speaking they should be about equal.

LightWalker said:

Which is more eficient?

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Stereodude said:

That depends on a lot of factors. Generally speaking they should be about equal.

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Buck usually has a slight advantage. However, with modern circuitry, they are usually VERY close to being equal.

The difference in voltage affects the efficiency more than wether it's boost or buck.

I.e- bucking from 10 to 3.5V is less efficient than boosting from 2 to 3.5 V, just as boosting from 3.5 to 10V is less efficient than bucking from 3.5 to 2V.