TK75 Runtime Tests

Here’s are a few runtime tests so that you can see what you might expect running the TK75 in the real world. All tests were done using Panasonic 3400 cells with Orbtronic¬†protection.

Run times estimated by Fenix are using their own 2600 mah cells. The advertised runtimes are as follows:

Low: 200h @ 18 lumens
Medium: 12h @ 400 lumens
High: 4h @ 1100 lumens
Turbo: 1h 15 min lumens

TK75 Runtime on High

I set the TK75 on high and let it run until it stepped down to medium. The light ran for a total of 4 hours and 46 Minutes. Fenix rates the light for 4 hours on high, so I was impressed with the bonus 46 minutes of run time from 3400mAH cells charged up to 4.18v. Read the rest of this entry »

TK75 Review

Everything you could need to know about the Fenix TK75

tk75 lumen levels

Power / Design

The first thing people notice about the TK75 is the 2,600 lumen rating. As you can see above: compared to 18 lumens, 2600 lumens is quite a contrast. In such a compact package it’s quite impressive. This is done using Cree XM-L LEDs and 4 lithium batteries. New glass allows even more light to escape enabling the TK75 to achieve even higher levels of brightness. Although the glass is very clear, at high levels of brightness it’s easy to see dust on the glass and a clear outline of yellow color emitted by the LED’s.

tk75 glass

Although the flashlight should have 4 18650 batteries, it can run on only two in the case of emergencies because of the 2S2p battery pack configuration. To get only two batteries to work you just need to put one cell on either side of the larger triangle mark on the side of the cell holder. Another way to think of this is you need one cell facing each way and both same side of the holder.¬† The reason that it’s not recommended to run the light regularly on only 2 cells is because the higher current rates put more strain on the lithium cells.

battery carrier


The TK75 beam has a flower shape. It’s mostly that flower shape that extends the flood to make it even a wider angle than the TK45.

TK75 vs TK45

Although the beam is wider than the TK45, it’s able to throw a much further distance. The beam throw on the TK 75 is 606 meters compared to the 45’s 200 meter throw. Besides the extremely clear glass, the light utilizes an extremely smooth reflector to reflect as much light as possible, making the light incredibly efficient.


Fenix tk75

Some users don’t like the yellow color of the hotspot. Some more sensitive to beam color might say it’s rather green. Compared to other LED beams it appears more yellow in my opinion.

Some users have reported fogging of the glass in extremely cold weather. This is due to the air outside of the flashlight condensing the moisture within the flashlight against the thin glass. One possible solution to this problem is placing silica gel in the battery holder and sealing it away in the light so that it can pull moisture out of the head. Changing the batteries in a cold & dry environment will help keep moisture from entering the flashlight.


Silica Gel

PD30 vs PD32

The Fenix PD30 is a fantastic flashlight, but that didn’t keep me from buying the PD32. Here’s why I felt it was worth it:

pd30 vs pd32

  1. Lowest setting lasts more than 2 times longer than the PD30.
  2. Turbo mode is 43% brighter while lasting 33% longer.
  3. PD30 accepts a single lithium battery.
  4. Other than low all levels are brighter and longer lasting.
  5. Side button and level memory is nice.

I would probably also rank those pros in that exact order. It’s nice to know your small little flashlight will put out so much light for such a long time.

Lithium batteries are nice to use as I use my torches on a daily basis and it would get costly to use non rechargeable lithium batteries. I went with Orbitronic batteries. There are quite a few cheap lithium batteries that you could buy for these torches but after reading a few reviews it’s clear that it’s well worth the money to get a safer longer lasting battery.

Some other small things I noticed was that the PD 32 is clearly larger than the PD 30. It’s not a big deal, just bigger. It’s probably made with more metal in order to dissipate heat more effectively. The only change that wasn’t welcome was a larger on off switch that makes it impossible to put the PD 32 on a counter top and have it rest on it’s back side.



Go Green: Buy an iPad

Desktop’s and Laptops use anywhere from 40 watts to 110 watts
while ultrabooks like the macbook air use even less while idling and an iPad only uses around 8 watts while surfing the web, check it out:



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How Much Power Does an iMac Use?

When powered off the 22″ dual core i5 iMac still uses 1.1 watts every other secondiMac Power. At startup you use 110 watts. About 40 watts sleeping & 80 just chilling with some windows open. A lot of the power is used to keep the 22″ screen nice and bright but the majority of the power is spent on processing.

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How much Power does an Apple TV use?

While the Apple TV is not sleeping (the light is on) it uses 1.8 watts. If the device is sleeping it uses .8 watts. This power requirement is because the device is still connected to WiFi and allowing all iOS devices on the network to know that it is available for playing back content. As soon as the apple TV is selected to play back content it springs to life.

Apple TV Read the rest of this entry »

Solar Power Cost

solar panel costSolar Power Cost is just one of the reasons why solar power is catching on slowly. It’s a convenient, quiet and clean power source but it’s not the cheapest option available. When factoring the solar power cost you need to take into account the cost of the panels, the cost of converting the power into usable AC power, and the cost of storing the power or returning it to the grid.

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It’s tough to call what the people at MYSOLARBACKUP do ethical. In fact I’d call it a ripoff and I’m surprised to see their spots on GBTV where Glenn Beck often makes stands on how he only chooses sponsors that provide value to his listeners. In this case it’s a sponsor with an “F” rating.¬† Here are a few things the people at MYSOLARBACKUP are doing to push their ripoff solar panels:

Dishonest Review Blogs

Google Solar Backup Scam

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How Much Power Does a House Use?

Energy HouseMost of the energy you consume is done in the home or by transportation. So how much power does your house use? There’s a meter for that! And every home on the grid has one. The energy usage is measured in kilowatt hours. Chances are you already know that as you pay for every single one of those kilowatt hours! So have you ever been curious where each one of those kilowatt hours comes from? Read the rest of this entry »

How Much Power Does a Laptop Use?

Laptop EnergyThe cheap answer for how much power a laptop uses is, “It depends on the laptop”. In general you can expect a laptop to use quite a bit less energy than a desktop. The processors in laptops are clocked down to use less energy to ensure longer battery life.

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