[Note: This is a re-upload of my original review which was first written on Jan 22, 2007]
I own both the Garrity Power Lite and the ILLUMINATOR wind-up flashlights. They have the same basic design, but with the following differences:
1. Size: The Illuminator is about the size of a man's electric shaver. It is easier to hold and to crank. The Garrity is bulkier, mainly because of the extra plastic lenses in front. It is also less comfortable to hold because rubber grips on the sides are shorter (see my Customer Image for size comparison)
2. Ease of Cranking: The Illuminator's handle takes very little effort to crank. However, you need to turn it virgorously (2-3 turns per second) in order to charge up the battery. The Garrity's cranking presents more resistence and is noisier. But the good news is that you only need to turn it at around one turn per second to charge up the battery.
3. Light Output: Both flashlights use 3 white LEDs, and have the option to turn on either one or all three. As far as I can tell, the LEDs are identical. The main differnce is that the Illuminator's light output is diffused, while the Garrity added three plastic lenses in front to produce a well-focused beam.
4. Light Duration: When fully charged up, the Illuminator gives out brighter light initially. However, its light dimmed down within a few minutes. After ten minutes, the light becomes barely visible (see my Customer Image above). The Garrity, on the other hand, produces fairly consistent light output for at least one hour!
Based on longer light duration, I would recommend the Garrity over the Illuminator. The Garrity is also cheaper when you order it with free super-saver shipping. (Be carefull when ordering The Illuminator, because some places offer the flashlight for $8-10, but charge another $8 in shipping!)
[The following Info for geeks only]:
Why does the Garrity produce much longer light duration than the Illuminator?
The Illuminator uses one 3.6V Lithium-ion rechargeable button cell (capacity unknown, probably around 30mAh). The Garrity uses 3x 1.25V NiMH cells rated at 80mAh. In my opinion as an electrical engineer, the NiMH design is much better because:
1. Each white LED needs about 20-40mA at 3.6V to produce sufficient light output. Three NiMH cells provide a consistent 3.75V throughout most of the discharge period. The Li-ion cell may provide up to 4V when fully charged, but its voltage drops quickly during discharge to 3.6V and below. This explains why the Illuminator produces a brighter light initially, but dims down much faster.
2. NiMH cells are more robust and can withstand over-charging better than Lithium-ion cells can. Think about it: there are chargers that can fully charge up NiMH cells in 15 minutes (that is, charging at 4X), but there are no chargers that can do Li-ion cells in less than one hour. In this case, since you can charge up the battery in one minute and then use it for up to one hour, that means the battery is being charged at 60X! This kind of abuse is not recommended even for NiMH, and it can be murderous for Lithium-ion rechargeable batteries.
[Update on April 9, 2007]
Warning: Don't crank the handle virgorously when you have just the middle LED turned on. This is because the voltage across three NiMH cells can be as high as 4.5V when being charged. At this voltage, excessive current can flow through the LED and burn it out - as I have found out for myself. Luckily I was able to replace the middle one with an ultra-bright greeen LED. (It looks really cool, too.)
[Update on Nov 6, 2007]
Please check out my review on
Duracell Crank Light 3 in 1, 3 LED Flashlight, Radio, Charger. I feel it is even better designed than the Garrity.
[Update on Dec 24, 2008]
I should add that all three Illuminator crank lights I bought two years ago are nearly useless now (batteries can't hold any charge). The two Garrity crank lights are still going well.