Technologies To Note:
Holosun Technologies Inc. has been an Original Equipment Manufacturer (OEM) for several years for many brands that you may be familiar with. This includes both components and ready to sell full sight systems. With this relationship, has come an accomplished team of engineers, research and development members and manufacturing expertise. Holosun has decided to build unique red dot / reflex sights under their own brand at a very competitive price.
50,000 Hour Battery Life:
You have already seen technology like this with more expensive sights. They uses techniques like pulsing the Light Emitting Diode (LED) to save power. Holosun has obtained the same battery life using their own proprietary technology but with a continuously on LED. The result is a sharper red dot. High quality CR2032 lithium cells, like the one supplied with Holosun sights have a capacity of 240 – 250 mAh (mili-Ampere Hours). At brightness level 6, the sight uses 4.92μA (micro-Amperes). Even without the other power saving features, this represents 50,000 hours of continuous operation. The measured current for each brightness level can be found in the specifications. Even at the maximum brightness level, the current draw of 179 μA still yields 1390 hours of operation. Still years of use at a couple of hours a day. The newest circle-dot reticle sights are able to have a battery life in excess of 30,000 hours.
Automatic power Off:
The HS403A and HS403G are designed to automatically power off the sight after 8 hours of inactivity. A slight vibration of the sight turns the red dot back on. This timing is adjustable from 2 – 8 hours. With normal use, this effectively extends the battery life to the shelf life of the battery. This also makes this sight a perfect for operating in low light situations so it will power on when you need it, without having to fumble with controls. There is also another benefit. Most folks don’t know that an LED has a finite life. Even if a manufacturer says their LEDs have a life of 50,000 hours, a common number, many won’t tell you that this is to the point of 50% of original specification intensity. The automatic power off feature extends the life of the LED itself as well as all of the electronics in the sight.
Battery in base (HS403A). With the extended battery life, Holosun was able to mount the battery in the base of the sight since you will only rarely need to replace the battery. This makes for a very compact sight and assists with eyes both open shooting. Some models also use either a low profile external battery compartment or a battery tray.
Holosun has taken their engineering expertise to develop a very bright and low parallax optical system. Parallax can affect your point of impact based on the position of your eye with respect to the central axis of the sight. Parallax should never exceed 10mm (.4”) or half the diameter of the objective lens. This means that at 30 meters (33 yards), there is no apparent parallax. Many sights at this price point will say they are parallax free but only beyond 50 yards.
PEO/MAO housing finish: Plasma electrolytic oxidation (PEO), also known as micro-arc oxidation (MAO), is an electrochemical surface treatment process for generating oxide coatings on metals. It is similar to anodizing, but it employs higher potentials, so that discharges occur and the resulting plasma modifies the structure of the oxide layer. This process can be used to grow thick (tens or hundreds of micrometers), largely crystalline, oxide coatings on metals such as aluminum, magnesium and titanium. Because they can present high hardness and a continuous barrier, these coatings can offer protection against wear, corrosion or heat as well as electrical insulation. Please see Wikipedia for details:
Customers often ask how we know that the battery life of Holosun sights is so long when they have only been on the market for a few years. It comes down to simple math.
Any battery or more properly referred to as a cell in this case, has a capacity. The capacity is measured in ampere-hours or Ah. As an example, a AA size cell has a capacity of 2 to 3 ampere-hours. This means that the cell can supply a current of 2 - 3 Amps for 1 hour.
A CR2032 Lithium cell, has an ideal capacity of 250 milli-ampere-hour (mAh). A good quality CR2032 has a capacity 220 – 240 mAh. The Energizer CR2032 cell supplied by Holosun.ca with all Holosun sights distributed by Holosun.ca in Canada, has a capacity of 240 mAh.
As an example, an HS403A sight operating at intensity level 7 uses 5.9 micro-amps (µA). Using a 240 mAh cell, the battery life would be 40,600 hours. (240 mAh / 0.0059 mA = 40,600 hours). This assume continuous operation. Many of the sights have an auto-off mode that effectively extends this life to the shelf life of the cell.
Holosun.ca has set up test equipment to confirm the factory specifications.
The test equipment includes:
And Extech MN16A digital multi-meter with a micro-ampere range,
A custom built battery holder for a CR2032 with binding terminals,
A CR2032 cell with the electrolyte removed and test leads attached that can be inserted where the battery tray goes,
and a variety of cables and probes.
HS403C at intesity level 6, showing a current draw of 5.4 µA.
Here is a table of actual readings from a selection of sights. Please note that the accuracy of the meter is +/- 1.5% and that the length of the tes leads likely add to the current draw. This is far from laboratory quality.
The solar mode tests were performed with a bright fluorescent lamp indoors.
A few calculation examples:
HS503C on battery with the circle dot reticle enabled. Intensity level 7. 240 / 0.0242 = 9,917 hours.
HS503C on battery with dot reticle. Intensity level 7. 240 / 0.0156 = 15,384 hours.
HS503C on battery with circle dot reticle enabled. Intensity level 12. We call this thermonuclear. You can see this in the sun. 240 / 2 = 120 hours
HS503C on solar with circle dot reticle. Intensity level 7. 240 / 0.009 = 26,666 hours.
Intensity level 7 is actually quite bright. Indoor shooting would be at an even lower setting. As you can see, the battery life at a mid-level setting is years. This is further enhanced by auto-shutoff settings. By the nature of the electronics, as intensity increases, current draw increases more rapidly. Even at higher intensity settings, battery life still exceeds the competition.
HOLOSUN® Limited Lifetime Warranty
To the original owner, your Holosun product is warranted free of defects in materials and workmanship with the Holosun Limited Lifetime Warranty. This warranty specifically applies to the metal structure of the product and does not apply to the optical and illumination systems. The optical system is covered by the 5 year warranty. The illumination system including electronics is covered by the 3 year warranty. Batteries are not covered under warranty.
In the event of a confirmed defect under this warranty, we will, at our option, repair or replace the product. This Limited Warranty does not apply to: (A) asserted defects caused by normal wear and tear of any part including knobs, camouflage finish, etc.; (B) asserted defects caused by modification, unauthorized service, accidents, neglect, misuse, abuse, improper maintenance, acts of Nature; and (C) asserted defects involving subjective personal likes or judgments. Also, this warranty is null and void if modification or maintenance is provided by someone other than Holosun. Registration is not required to validate this warranty.
To receive a Return Authorization (RA) number for warranty service, you will need to do the following:
Call +852-35689201 or email describing your issue. Including images can assist with the process. A copy of the original Proof of Purchase showing date of purchase must be provided to process the RA.
Once the request has been received you will either receive a reply by email that contains all of the necessary return information, or a customer service representative will contact you and give you an RA number over the phone.
If the date is less than 90 days from the purchase date, Holosun will cover the cost of shipping the repaired or replacement product back to you. Otherwise, please include a check or money order in the amount of $10 payable to Holosun Technologies Inc. with the product being shipped to use. This partially offsets processing and shipping costs. All return transportation, insurance and freight charges associated with the warranty service and repairs are the responsibility of the purchaser.
** We ''Sword Tactical Supply'' have the final decision availability of the after-sales warranty service to customers. **
Click on the image below to download and print a zeroing target that will help you get your sight lined up as quickly as possible.