The Preon ReVO from 4Sevens is the latest mini sized keychain flashlight that packs quite a punch for its diminutive size.
The first thing that stands out, besides its tiny size, is that it takes a common AAA battery, which you can find almost anywhere.
Here are the specs:
- LED: CREE XP-E R2 Emitter
- Six modes of output
- Low: 1.5 lumens, 2.8 days
- Medium: 19.8 lumens, 5.7 hours
- High: 82 lumens, 0.9 hours
- Strobe: 2.5 hours
- S.O.S.: 2 hours
- Beacon: 48 hours
- Length: 2.8 in
- Diameter: 0.5 in
- Weight: 0.46 oz
- Power: One AAA battery (included)
- Operating Voltage Range: 0.9V~1.5V
- Material: Type III, hard-anodized aircraft-grade aluminum
- Lens: Optical grade glass lens with anti-reflective coating
It comes with a battery, keyring, and spare O-ring.
The bottom of the Preon ReVO has the keyring attachment. The bottom is flat but not very wide. You could balance it on end like a candle, but it’s not very stable.
The Preon ReVO has no button switch. Instead, you twist the front end once for low, again for medium, and a third time for high. If you do this low/medium/high cycle twice, you enter into the flashing modes of strobe, SOS and a beacon (blinks once every 10 seconds).
I compared the Preon ReVO against a cheap plastic keychain light I already had. Here are the results taken in a darkened room. The wall is about 6 feet away. Camera was set to the same manual exposure each time.
In this case, the cheapie LED squeeze light was brighter than the Preon ReVO on the lowest setting, but the Preon ReVO blasted far more light in the medium and high setting.
Will I keep this? To be honest, I’m not too thrilled about the twisty on/off switch. I prefer pushbuttons. But that’s just a preference. My wife was happy to make this part of her purse arsenal due to its small size and high output. At $47 it’s not cheap for a “just a light” but I think the price is just right if you need that extra “oomph” at your keychain.