Besides being a private customer, I have no relationship of any kind with Garmin or their competitors. I have bought all my GPS devices from my own money as a private customer from resellers in Germany, without telling anybody that I eventually would write a review about the respective device.
I never have had contact with any Garmin (or their competitors') representatives, except the support staff solely for getting answers to some technical questions (mostly without success, but that is another story). Nobody has ever given me money or another advantage for publishing or not publishing certain facts or opinions about a certain GPS device.
As I am independent of Garmin's donations, I won't parrot the stupid talk à la "The legend is back", like almost all other blogs do to keep Garmin donating them devices for "testing" or to push their own sales.
Being a passionate mountain biker for more than 30 years, I am using GPS devices since about 15 years. I always have trusted Garmin's devices, although their software regularly upsets users all over the world, including myself. But there was just no reasonable alternative. Among others, I have used the GPSmap 60cs, 60csx (the version with the SirfStar III), 62s, 64s, the Montana 600, the Oregon 600, the Oregon 700, and the Monterra.
While I had to return the Montana 600 for various reasons and the Monterra for its crappy software shortly after having bought them, the other devices mentioned above were reliable and working as intended, except the Oregon 600, which began to turn off itself (and refused to reboot before having waited a long time) just during the hardest, longest and most dangerous ride I did so far (this happened in 2016, approximately three years after having bought it, although always having it treated with caution).
Despite the reliability of most of my devices, I have never been really happy with them for one single reason: Their screens are way too small for my type of usage. I don't care about the weight of a device, and I don't care about its design. I need it when I am riding 10 hours and longer in areas which are dangerous, completely unknown to me and (in some cases) with nobody around for many hours. I don't care if that 10-hour-ride takes 5 minutes longer due to the device's weight. Instead, besides reliability, the most important property of a GPS device for me is a big screen which a) really can replace a paper map, and b) allows to conceive as much data as possible at once.
You can imagine how much I was craving for an outdoor GPS device with a bigger screen for many years, and how excited I was when Garmin's 276cx came to my attention. While this device primarily is meant to be used in or on motor vehicles, I could very well imagine it mounted on the handlebars of my mountain bike.
So I ordered it in the spring of 2018. To anticipate the results of my tests, I was nearly crying after having noticed that Garmin one more time has managed to render excellent hardware unusable by moronic software, and that I had to return the device because it was just not usable for me.
In the following sections, I will explain in detail how the device fails with my usage scenario. Although I am a mountain biker, I am convinced that nearly all types of users will be affected by the flaws, especially hikers, but (somewhat less) owners of motor vehicles as well. Notably, the last of the issues mentioned below will affect every user.
Issue 1 (no or minor impact)
Obviously, Garmin's own bicycle wattmeter can't be used with the 276cx. Most of the usual ANT+ sensors can be used (e.g. heart rate, speed), but the wattmeter is not listed at the place where the sensors are configured.
While this is quite interesting, it is no issue for me, because I don't use a wattmeter anyway. But it already might disqualify the 276cx for some of my fellows.
Issue 2 (no or minor impact)
The stopwatch functions are quite crippled in comparison to other Garmin devices (for example, the Oregon). Again, this is no issue for me, because I actually haven't used the stopwatch (after having played with it a little bit at home). Others' mileage may vary.
Issue 3 (minor impact, quite acceptable)
Compared to other Garmin devices, the 276cx lacks a lot of functions and applications and is less configurable. Some will consider this an advantage, others a disadvantage. The device concentrates on its core functions, which generally is not bad. As a mountain biker, I don't need geocaching and all the other bells and whistles on my device, so the lack of functions does not have an impact for me per se.
But at least Garmin could have made the core functions more configurable. For example, the order in which the different screens appear when you switch between them using the hardware keys cannot be configured. Although this is mitigated by the fact that there are not too many screens due to the reduced functionality, and that switching the screens is fast, precise and possible in both directions, it is one example among many others.
However, the lack of functions and configurability really isn't a show stopper for me, because all important (from my point of view) functions are provided. I didn't miss anything which could be essential.
Issue 4 (completely unacceptable)
This issue made me extremely angry, because it is such silly and annoying, and it shows that Garmin either does not test their devices while developing them, or that they absolutely don't care about their customers.
The 276cx can be connected to a WLAN. But at the place where you enter the WLAN password (shared key), not all common characters are provided. While I understand that we cannot enter Swahili, Farsi or Chinese characters here, I am really upset that common ASCII characters like curly braces ({}) and square brackets ([]) are missing.
Garmin must be bonkers if they really expect me to change my WLAN password on all of my access points and all of my client devices just because they are too silly to provide a virtual keyboard which contains the most common ASCII characters.
This issue on its own would have made me return the device, even if it hadn't had the other unacceptable issues mentioned below. Such stupidity is just inexcusable, and since Garmin is well known for not reacting to user complaints in any way, you can be sure that this annoying bug won't be corrected.
Issue 5 (minor impact, acceptable)
At the time of this writing, Garmin claims the display of the 276cx to be a "bright, sunlight readable WVGA display". Maybe I am too strict here, but I consider this statement to be very misleading, especially for people who have owned other outdoor GPS devices. Such people might be tricked into believing that the 276cx has a transflective display.
But the opposite is true. Basically, the 276cx's display behaves like a smartphone display. If the backlight is turned off, it is just not readable in bright sunshine, and the brighter the sunshine, the worse the readability.
However, the backlight (and the display in general) are a masterpiece. I have conducted tests with rechargeable NiMH batteries (low self discharge type, 2500 mAh). I have fully charged the batteries in a charging unit, put them into the 276cx, turned the backlight on at maximum intensity, and waited until the device turned off due to low batteries.
I was absolutely baffled that I got a runtime of about 7 hours. I could not believe it the first time and have repeated the test multiple times, getting the same result each time.
During the test, I had turned off WLAN and Bluetooth, but I had turned on GPS (including GLONASS and WAAS / EGNOS). These conditions reflect my real usage conditions. While the processor might consume more power during real usage because it moves the map over the screen or updates the figures in the trip computer while riding, I don't need the backlight to be at 100%; in my tests, I could perfectly read the display even in the brightest sunshine with the backlight at 60% or 70%.
I am expecting that the two effects (CPU consuming more, display consuming less power) will balance out more or less, so that I get a real runtime of 7 hours and up, which is absolutely excellent for a device with such a display. Given Garmin's cleverness in constructing the battery compartment (see below), this gives me a runtime of about 30 hours with 12 NiMH rechargeables, which is absolutely great (and, by the way, which is what I want to be prepared for cases of emergency).
In summary, I am considering it a bad practice to advertise "sunlight readability" without mentioning that this does not mean "transflective". Nevertheless, the display is a masterpiece in every regard. Im am still excited due to the great runtime the 276cx provides with simple NiMH rechargeables even if the backlight is at 100% all the time, and due to the display's good readability with the backlight at 70% in every situation I have met.
Issue 6 (great impact, barely acceptable)
As a mountain biker, I either want to have a transflective display which provides good readability without backlight. or I want to have the backlight turned on all the time. I will definitely not take one of my hands from the handlebar to turn on the display. Therefore, I am exclusively interested in a device's runtime with the backlight continuously turned on at sufficient intensity.
Now imagine my expectations before I began to test the 276cx's Li-Ion battery (which is included in the package). The calculation is simple: If the cheap NiMH rechargeables rated at 2500 mAh could power the device for more than 7 hours, the Li-ion battery, which is rated at 4400 mAh, should provide a runtime of whopping 12 hours.
For those who have never seen a similar Garmin device and wonder why we have a choice here at all: Garmin has been extremely clever when designing the 276cx's battery compartment. It can take either Garmin's proprietary Li-ion battery or three AA batteries (or NiMH rechargeables). The idea is to use the big Li-ion battery under normal circumstances, but to be able to use AA batteries or rechargeables under conditions where the Li-ion battery would not be appropriate or would fail. Furthermore, standard AA batteries are one of the few things which you will be able to buy virtually everywhere in the world.
Coming back to the subject of this section, I have been completely disappointed after having realized that the big, proprietary and expensive Li-Ion battery provided only 8 hours of runtime under the exact same conditions where the NiMH rechargeables already provided 7 hours. Again, I have repeated the runtime test with the Li-Ion battery multiple times, and again, the result was the same each time.
Of course, I could not just tolerate this without digging further. If reality deviates from theory so crassly, I am becoming curious. I have done thorough measurements with the Li-ion battery, and even have talked to battery experts.
The battery has 4 pins which Garmin does not document. However, we have found out that the two outer pins provide the voltage to the electronics; the voltage between these pins was 4.072 V after having charged the battery within the device via USB.
We were not able to find out what the two inner pins are for. Between the (outer) 0 V-pin and both of the inner pins, the voltage was about 0.3 V lower than the voltage between the outer two pins. This let us assume that the two inner pins are connected to the main voltage via diodes. We can only guess that they are used for some sort of monitoring while the battery is being charged or discharged. However, monitoring, if any, is not performed as usual via an NTC resistor, and the middle two pins do not carry data signals of a battery management system. So we have given up on this subject.
Anyway, the interesting thing is that the outer two pins (as mentioned above) provide a voltage of 4.072 V after the battery has been fully charged. This shows that there might be serious flaws in the software or hardware which control charging, or that something very odd is going on otherwise:
The battery is of type 1ICR19/65-2. That means that it includes two Li-ion cells with Cobalt anode (LiCoO2) which are connected in parallel; this type is still the most common type of Li-Ion cells. For such cells, the charging end voltage (which is equal to the voltage the cell provides immediately after having been fully charged) should be 4.2 V. But once again, the 276cx charges the battery only to 4.072 V.
This difference might seem to be negligible. But taking into account that (with this type of battery) the last 0.1 V or 0.2 V of the charging end voltage can be responsible for 10% or 20% of the whole capacity (the exact figures depend on the literature source), it could partly explain the disappointing runtime which the 276cx's Li-ion battery provides.
We can only speculate why the 276cx stops charging the Li-ion battery prematurely. Either this is just due to flaws in the charging hardware or software, or Garmin has to be extremely cautious, perhaps because they haven't implemented a reasonable charging (temperature) monitoring (see remarks above about the middle contacts of the battery and the obvious absence of the usual NTC resistor), or because they buy the batteries' components at the spot market and want to be safe against getting inferior material.
Additionally, if you overcharge a Li-ion battery of this type even by the smallest amount (for example, 0.1 V), very bad things can happen (that means: the battery can overheat or explode in the worst case), so perhaps they didn't trust themselves and implemented that low charging end voltage by intention.
Whatsoever, even if we are extremely (unrealistically) optimistic and assume that we could get 20% more capacity if we could charge the battery to 4.2 V, that would still only be about 10 hours of runtime; two hours would still be missing. At this point, since we have jobs besides mountain biking and GPS devices, we had to give up on the subject.
Issue 7 (great impact, barely acceptable)
Garmin does not offer a charging unit for the Li-ion battery of the 276cx. How am I expected to charge the batteries if I have multiple of them? There are two options:
1) The 276cx can charge the Li-ion battery when connected via USB. I definitely don't want to do this for the following reasons:
a) The rubber tip which protects the USB connector (and thus is a key part in making the device compliant to IPX7) is a predetermined breaking point. This is not due to a bad design by Garmin; rather, rubber of that sort will break after having been bent away and back several hundred times.
Additionally, I don't know the number of mating cycles the USB connector will stand, but I doubt that it will be more than some hundreds.
For that reasons, I am refusing to pull off and re-insert the cable and the rubber tip all the time just to charge the battery.
b) Charging the battery in the 276cx takes a lot of time. If I'd like to charge three batteries, that already would take nearly a whole day (this means 24 hours).
c) Charging multiple batteries in the device forces the battery compartment to be opened and closed multiple times. Although the compartment cover and the parts in the compartment are solid and leak-proof, their wear will inevitably increase every time the cover is removed and re-mounted again, which might affect water and dust resistance over time.
Of course, I am aware that I have to open the battery compartment anyway when I have to change the battery (or batteries) while riding. This is inevitable; there is no technical solution to it. But this in no way is a reason for increasing the battery compartment's wear even further by opening and closing it all the time just for charging the battery, because there is a simple solution to that problem: Garmin should offer an external charging unit for the 276cx's Li-ion battery.
2) The 276cx (probably - I did not test) can charge the battery when placed in a special (motorcycle) mounting. The 276cx has multiple electrical contacts at its side, and appropriate mountings typically incorporate the respective counterparts which provide voltage (and other signals which are not of interest here) to the device. For this to work, cables which are coming out of the mounting in turn must be connected to an external voltage source (in most cases, some vehicle's on-board power supply).
While charging the battery that way would solve problem 1a), problems 1b) and 1c) would still remain. Furthermore, since I am in mountain biking and hiking (and not in ATVs, motorcycles and the like), I definitely will not take a motorcycle mounting or a car battery with me just to be able to charge the 276cx's battery.
To summarize this issue, it is absolutely inexcusable that Garmin does not offer a separate charging unit for the 276cx's Li-ion battery.
Issue 8 (great impact, not acceptable)
The 276cx begins tracking (that means recording the track and feeding data into the trip computer and odometer) immediately after having been turned on. Many users complain about that; it is a great problem for the following reason:
Suppose you are flying 5000 km with your 276cx and your mountain bike, and that you turn on your device after having arrived. In that moment, you'll have a new track on your device the length of which is 5000 km. Of course, that track can simply be deleted, but the problem is that 5000 km now have been added not only to the trip odometer, but to the general odometer (which records the whole length of all tracks together) as well.
This is extremely stupid and a real problem for me as a mountain biker. Like nearly all of my fellows, I am resetting the general odometer when the season begins (once per year), and when the season has finished, I want to know the whole distance I have traveled riding my bike during the season simply by taking a look at the general odometer.
The behavior described above makes this impossible. Every time I turn off the 276cx, then take it with me in the car, the train or the airplane, it adds the respective distance to the general odometer as soon as I turn it on again.
At least, it tries to do so. There seem to be two ways to work around the problem, but both are not a real solution because you can easily forget to perform the necessary steps at the right moment, and if you do so even one single time, you will inevitably suffer from the problem and can't revert the mistake.
a) When having finished the previous trip, set the device to "Use with GPS off". I didn't have the time to test thoroughly, but I hope that this is a permanent setting which survives reboots (please drop me a message if you can confirm or deny this), and if this is true, the device should not be able to track or record anything any more.
When you want to begin tracking and recording again (that means: after having traveled the distance you did not want to be recorded), turn the device on again and disable tracking and trip recording, using the appropriate menu item. There will no time pressure at this stage, because the device still operates with GPS off and thus can't do anything stupid while you are busy with operating the menus.
After having disabled tracking and trip recording, make the device use GPS again, using the appropriate menu item, and wait until it has got a reasonable position fix. When this has happened, re-enable tracking and trip recording.
This method should keep the device from unwantedly tracking and recording certain distances and adding them to the odometer. If anybody has tried this, please let me know. I didn't have the opportunity to test it.
b) When turning on the device, you could try to be fast and to disable tracking and trip recording before the device has got a position fix.
Both methods are error-prone, and the second one will generate a lot of stress in just that situation where there should be relaxation and pleasant anticipation.
To make things absolutely clear: On the 276cx, you can disable tracking and trip recording using the appropriate menu item. But this setting is not permanent, meaning that it does not survive reboots, meaning that the device will track and record again immediately after having been rebooted regardless of the previous setting.
Therefore, we must use workarounds like those mentioned above.
In this context, I cannot help criticizing Garmin's support. Hoping that I had missed something, I called them to ask if it really is impossible to disable that misbehavior. As usual, it took at least 30 minutes in the wait loop to get connected to a real person.
Now the first surprise was that the support staff told me that they were not authorized to answer any question regarding the 276cx. Instead, they would write down my questions and contact data and forward them to an internal department of specialists, who then would call me back; needless to say that they needed over a week to do so although I had made clear that the subject was urgent for me (I had to decide if I would return the 276cx or not, and the deadline wasn't too far away).
The second surprise was how incompetent they were. Needing several days for anwering such a simple question is just ridiculous. Then, when calling back, they told me that this behavior was desired. They tried to explain that it would not impose any problem because the tracking would not start until the device would be moved (that is, only moving the device would trigger the tracking), so I could easily avoid the problem by disabling the tracking and recording before moving the device after having turned it on.
This is one of the most idiotic statements I ever have got from the support staff of a company. This stupid ass who is considered a specialist by his employer obviously never has used a GPS device. Otherwise, he would know that every GPS device, when powered on, needs to get a position fix first, and after the first fix, the subsequent fixes will become more and more precise within a short time. The position fix will first be several dozens or even hundreds of meters off and then will continuously become better until it is stable
Given that, it should be clear that the position the GPS chip reports to the device heavily fluctuates during the first seconds (in some cases, minutes) after having booted. From the device's point of view, a fluctuating position of course means a movement, unless intelligent software knows about the problem and takes special countermeasures.
The software on Garmin's devices, including the the 276cx, obviously is not that intelligent; hence, the 276cx, immediately after having booted, believes to be moved and begins to track and record immediately and not only when it is actually moved.
I can very well imagine that not only mountain bikers or road bikers, but all types of users are affected by this problem. For example, ATV drivers may be interested only in the distance they have traveled in the wild (and not in the distance which is between their home and the wild), and there surely are much more other examples.
As a final statement, please note that I am located in Germany; the quality of Garmin's support might be better in other countries.
Issue 9 - the final dealbreaker (completely not acceptable)
For a mountain biker, there is only one reason to put a GPS device as big as the 276cx onto the handlebars: We want to conceive as much information as possible at a glance. The big screen of the 276cx is the main reason to buy it, isn't it?
So I expected that I finally had a device which would be able to show me all momentary (for example, heart rate, current speed and so on) data and all trip data (for example, distance, ascent and so on) I am interested in on one page (screen). The 276cx provides three different views to present such data (see screenshots below):
The first one is called -surprisingly enough- "Trip Computer". This view wastes a lot of screen space for data which probably is irrelevant for most users, at least in part. Unfortunately, absolutely nothing can be configured here.
Another view is called, "4 Big Fields"; as the name implies, it shows four data fields with giant letters or digits, respectively. Each field can be configured freely by choosing its content from a long list which probably contains everything you will ever think of. However, this view is of no interest to me because I need about 16 data fields instead of 4, and my eyes are not so bad yet.
The third view is called "2 Columns (Small)". Here, the screen is vertically split into a left and a right area. In the right area, there are up to 10 data fields which can be freely configured (as with the "4 Big Fields" view). So far, so good.
But I was really shocked when I noticed that the left area (which is half of the screen) cannot be configured in any way. Again: The left half of the screen cannot be configured. To cap it all, the information shown there is completely irrelevant to me as a mountain biker, and to be honest, I cannot imagine anybody who needs it (see screenshots below).
This definitely is the final dealbraker. It is inexcusable, and there is no workaround. So Garmin's software development has managed to do a thing which every other sane developers would have been unable of: To completely destroy the benefit of the big and excellent screen. This is inconceivable.
Summary
The 276cx is an excellent piece of hardware. Sadly, Garmin's software development team is famous for bricking good hardware by inferior software. With the 276cx, they have outdone themselves one more time.
If Garmin would change the software so that you actually could use the whole screen for a configurable trip computer, and so that the device would not begin tracking immediately after booting, I would recommend and buy it despite the other disadvantages.
But with the current software, I would strongly discourage buying the 276cx. Although I am a mountain biker, and although this might have slightly biased my analysis, I am pretty sure that many of the flaws described above affect all types of users.
Unfortunately, none of the other reviews I have read (and this a lot) did mention the issue with the immediate tracking, that you can't configure a reasonable trip computer view, or the missing charging unit for and the problems with the Li-ion battery.
Either they are sloppy, or they didn't notice it, in which case they are not the experts they claim to be, or they have just been corrupted by Garmin's donations.
I hope that this review will keep potential customers from a mispurchase, and on the other hand will put some pressure onto the subject. But given Garmin's long history of ignoring customers' complaints, I don't expect anything.
Screenshots
Screen "4 Big Fields": Field contents can be configured freely, but 4 fields are not enough for me, so I won't use that view.
Screen "Trip Computer": Absolutely nothing can be configured here, and the information shown is irrelevant to me to the greatest part, so I won't use that view either.
Screen "2 Columns (Small)": The contents of the data fields in the right area can be configured freely, but the left area cannot be configured in any way and wastes the whole space for information which is completely irrelevant to me (and to most others, I suppose). This is the final dealbreaker.
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