DinoDirect has the Small Sun SIPIK SK68 3-Watt Focus Cree LED Flashlight for $7.39 with free shipping. Features 180 lumens brightness, T6061 aluminum construction, bolted belt clip, and uses 1 AA battery.
This color SK68 is on sale at dinodirect for $7. I have a black one for some repair work and it is easy to be forgot to take home because it is hard to see in dark area. The color one like red is much easier to find.
Limited DinoDirect packing stars will be designated weekly for your package beautification and package related requirements.Besides offering free exquisite gift packing service, we offer more as follows. Enjoy a different shopping experience.
so by more than doubling the voltage fro 1.5v (AA) to 3.6v (14500) it get the 300 lumin output? I wonder how much the life of the LED gets shortened by the higher voltage.
^^ The problem is Li-Ion starts at 4.2V if fully charged. That will result in higher light output but these are boost-only driver designs, a large percentage will fail from excessive heat.
No you won't get 300 lumens output, but possibly 200+ lumens versus the (closer to) 120 lumens this has with 1 x AA.
The issue is that random specimens of LED have different forward voltage and random chargers don't get the cell all the way to 4.2V. Some will have a flashlight where the LED specimen has high enough forward voltage that it won't have excessive current (per the design and heatsinking) enough to fry the LED or driver, but the average 3W light with a boost circuit (just about all 1 x AA generic designs and even major brands) will be damaged.
Shorter version - don't use Li-Ion in a light that can run off 1 x AA. If you want a bright light that runs off Li-Ion, buy one designed to do so, one that does not claim capable of running from 1 x AA cell because NONE are designed to do both, they are either boost voltage type for 1 x AA or buck/PWM buck regulation for Li-Ion. No desirable light does both because doing both lowers efficiency, raises cost, and increases size.
HOWEVER, if you have a custom Li-Ion charger that only charges the cells up to 4.0V, in that case the survival rate for the light increases dramatically, although your cell isn't fully charged so the runtime will be lower.
@dave_c all valid points, but I've been using a 14500 in mine for months now and it's been okay. Sure it heats up a little running at twice the voltage, but the increase in light output is worth it. If it fries the LED at this point, I will have gotten my money's worth.
although even at 1.5v this is my favorite flashlight I've ever used
^ If it were mine, what I'd do is pull the driver board out and solder a schottky diode in series to lower the voltage by a couple tenths of a volt so it never sees 4.2V... or even two diodes in series with the driver board circuit jumpered out since this doesn't seem to be multi-mode.
or a 14500
you can get them for $5.75 SHIPPED from eBay all day long
just search for CREE LED Flashlight 7W 300LM and look for the Buy it now
bens playing with my link but here is goes again (put this # into the search 120945436230 )
or C&P this below (it was NOT REMOVED and IS AVAILABLE
www.ebay.com/itm/120945436230?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_nkw%3D120945436230%26_rdc%3D1
We have a few of these (at $10 from Chinese sources). It's a brilliant design, flood-to-spot. Definitely worth the price.
(That eBay offer no longer works)
This color SK68 is on sale at dinodirect for $7. I have a black one for some repair work and it is easy to be forgot to take home because it is hard to see in dark area. The color one like red is much easier to find.
http://www.dinodirect.com/flashlight-sk68-cree-120lumen-convex-lens-led.html?DDID=3520-616
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so by more than doubling the voltage fro 1.5v (AA) to 3.6v (14500) it get the 300 lumin output? I wonder how much the life of the LED gets shortened by the higher voltage.
Order from Dino and you will get 7 emails from them within 2 day.
Never again.
^^ The problem is Li-Ion starts at 4.2V if fully charged. That will result in higher light output but these are boost-only driver designs, a large percentage will fail from excessive heat.
No you won't get 300 lumens output, but possibly 200+ lumens versus the (closer to) 120 lumens this has with 1 x AA.
The issue is that random specimens of LED have different forward voltage and random chargers don't get the cell all the way to 4.2V. Some will have a flashlight where the LED specimen has high enough forward voltage that it won't have excessive current (per the design and heatsinking) enough to fry the LED or driver, but the average 3W light with a boost circuit (just about all 1 x AA generic designs and even major brands) will be damaged.
Shorter version - don't use Li-Ion in a light that can run off 1 x AA. If you want a bright light that runs off Li-Ion, buy one designed to do so, one that does not claim capable of running from 1 x AA cell because NONE are designed to do both, they are either boost voltage type for 1 x AA or buck/PWM buck regulation for Li-Ion. No desirable light does both because doing both lowers efficiency, raises cost, and increases size.
HOWEVER, if you have a custom Li-Ion charger that only charges the cells up to 4.0V, in that case the survival rate for the light increases dramatically, although your cell isn't fully charged so the runtime will be lower.
Forgot to mention, for what they are these are a great value at the price... running off 1 x AA NiMH like Eneloops.
@dave_c
all valid points, but I've been using a 14500 in mine for months now and it's been okay. Sure it heats up a little running at twice the voltage, but the increase in light output is worth it. If it fries the LED at this point, I will have gotten my money's worth.
although even at 1.5v this is my favorite flashlight I've ever used
^ If it were mine, what I'd do is pull the driver board out and solder a schottky diode in series to lower the voltage by a couple tenths of a volt so it never sees 4.2V... or even two diodes in series with the driver board circuit jumpered out since this doesn't seem to be multi-mode.