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spick 发表于 2012-2-8 19:00
不是,如果用xml,电压超过3.7v就不是横功率了
If the KL4 head is the old version that uses a Luxeon V LED, then the driver is a boost driver that was designed to boost 2x123A (at roughly 5V) to power a ~6.5V LED. If you use a Seoul P7 with Vf of around 3.0V at the boost driver's drive current of around 650mA, your Vbatt > Vload and you'll be in direct drive. Whether or not the boost driver will like this depends on how hard you run the LED in direct drive and how robust the driver is. For 1xLi-ion at a nominal voltage of 3.7V, a P7 could draw over 2A drive current. I know that folks on CPF have done this mod and have claimed that it works, but my opinion is that it is unwise and the numbers don't bode well for product reliability/longevity.
You will face the same issue with an XM-L swap in an old version KL4. In fact, it'll most likely be worse than for a P7. At 3.7V Vf, an XM-L will draw well over 3A. You risk cooking the LED and the boost driver.
For the old version KL4 that uses a Lux V, the standard LED swap is with a Cree MC-E wired in 2S2P. That is electrically compatible with the stock SureFire boost driver.
Now if your KL4 is the new version that uses a Seoul P4, then a direct swap to a P7 or XM-L should work fine, at least in terms of driver compatibility. You'll probably have to drill out the reflector opening to fit the larger diameter P7. You may also have to change how you solder the P7's leads to the KL4 since the P7 is much larger in diameter than a P4. For the XM-L, you may have to shim it to the proper focus height, depending on what MCPCB the XM-L is on.
http://www.candlepowerforums.com/vb/showthread.php?326800-KL4-amp-L2-Upgrades
my fault, found this on cpf
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