Dynamo Illuminator Wind-up LED Flashlight

by Dynamo

• Unbreakable LEDs
• 60 seconds of winding for 1 hour of light
• No batteries to replace
• Easy to hold while winding

Product Description

Be prepared for an emergency at home or on the road with this super bright flashlight that never needs batteries. One minute of cranking gives you up to one hour of super bright light which could make all the difference in an emergency. Features: Compact, handheld design Three super bright, LED lights Hand crank, rechargeable power source No batteries to replace 2 month manufacturer's warrantyMake sure you have one at home, one in your emergency kit and one in your car and always be prepared.

Most Helpful Customer Reviews

210 of 210 people found the following review helpful

3.0 out of 5 stars Consider the Garrity Power Lite instead January 21, 2007

By NLee the Engineer HALL OF FAMETOP 10 REVIEWER

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 means charging at 4X), but nothing can charge 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]
The Lithium-ion rechargeable battery in my Illuminator probably was already damaged (from over-charging) when I did the comparison above. It has deteriorated further since then, and can hardly sustain five minutes of light now.

51 of 55 people found the following review helpful

5.0 out of 5 stars Outstanding Flashlight December 7, 2005

By Ryan T. Daniel

I picked up one at a local drug store (rhymes with smallgreens) for only fifteen bucks. Works way better than I expected. I wound it for one minute the first night

and it is at full brightness two weeks later.

The three LEDs are extremely bright. Bright enough to blind you if you look straight

at them.

Definite five star product. I wish they would make more products like this.

27 of 31 people found the following review helpful

5.0 out of 5 stars What a great idea!!! October 27, 2005

By K. Hopp

A friend of mine demonstrated hers outside one night... Wow! What a great product!! The LED's are very bright and it's easy on arthritic hands. You don't really need to wind it for the full 30 - 60 seconds for it to work right away. A must have!! Think of the money you could save in batteries!!