Wolf Eyes LRB150A yellow output help

[Paul520]

My 2C 3x123 kpr112 light has a very bright and white beam with fresh batts.

I know almost nothing about rechargeable li ion batteries.

I wanted to get a WE 2 or 3 cell rechargeable light but was wondering if
using the Wolf Eyes LRB150A Batteries at 3.7v each (or the LRB-168A)
with the less overall voltage in the same light vs using primaries, would
have a dimmer or yellow output because of the reduced voltage?

(For instance, two models of the Sniper have either 2 x 123a @ 6v or
one LRB-168A @ 3.7v for a voltage difference of 2.3v)

Or doesn't it make any difference at all?

 

[cernobila]

My 2C 3x123 kpr112 light has a very bright and white beam with fresh batts.

I know almost nothing about rechargeable li ion batteries.

I wanted to get a WE 2 or 3 cell rechargeable light but was wondering if
using the Wolf Eyes LRB150A Batteries at 3.7v each (or the LRB-168A)
with the less overall voltage in the same light vs using primaries, would
have a dimmer or yellow output because of the reduced voltage?

(For instance, two models of the Sniper have either 2 x 123a @ 6v or
one LRB-168A @ 3.7v for a voltage difference of 2.3v)

Or doesn't it make any difference at all?

OK, in a Sniper you can use 2x CR123 primary cells with a 6V lamp.....or you can use a single 168 cell with a 3.7V lamp. You simply have to match the cells with the lamp....If you get the Raider then you will need 2x 150 cells and a 9V lamp. In all these cases the beam quality is just fine, the way its meant to be.

 

[Paul520]

If you get the Raider then you will need 2x 150 cells and a 9V lamp.

Thanks. If a 150 is 3.7v, and 2 are 7.4v, wouldn't the 9v lamp be underpowered? Like this one?

 

[mdocod]

Hi Paul520,

It has been my experience, that primary (single use) cell label voltages correspond more closely to the cells OPEN CIRCUIT (unloaded) voltage; While secondary cell (rechargeable) label voltages correspond more closely to an average voltage under a typical load that the cell is designed to operate under.

A CR123 actually measures about 3.2V fresh from the package, but under the load of say, a tactical lamp assembly, the operating voltage drops to about 2.5V almost immediately due to internal resistance of the cell, holds steady around there for much of the discharge, then begins to fall to ~2V, then shortly thereafter goes "dead."

A 3.7V li-ion cell, like a LRB-150A cell, will actually read about 4.2V fresh from the charger, and will operate from ~4V diminishing to ~3.5V during the majority of a discharge into a typical tactical lamp, so it's called a 3.7V cell.

Basically, what this means is that, a pair of properly sized 3.7V li-ion cells will work very well in a light designed for 3xCR123s because both configurations will have very similar OPERATING voltages under the load of the lamp.

Eric

 

[therisensun]

CR123 Primaries have a 3.0 v resting voltage ---- but drop to around 2.4 or 2.5 volts for the amperage draw of most of the commercially available lamps --- a little less for higher amperage bulbs. The operating voltage of 3 x CR123 primaries and 2 x 3.7 or 3.6 v li-ions is virtually the same.

Because the lamps operate on 3 x CR123 primaries they're commonly listed as 9 v lamps. Most people would be unaware of the voltage drop.

The spec page you linked to lists:
Lamp assembly 9.0V D26 Avanced Xenon (shock resistant)
Battery type 2 - LRB-150A Li-ion Rechargeable

You could also run it on 3 primaries.

I TYPE SLOW --- MDOCOD ALREADY PROVIDED A BETTER ANSWER.

 

[Paul520]

Excellent! Thanks so much guys. Now I really understand.