Red90

Yes, but you need to fabricate something to press the button down inside the battery compartment.

The settings have no affect on battery life. They only affect the meter accuracy.

An ipad mini is pretty close to the size of some phones! My response was more of a general response to why someone would want to buy an addon. It was not specific to Geocaching. A lot of people use an ipad for vehicle navigation and it fits that need well.

In my personal experience.... It makes a substantial difference.

Something like an iPad. The wifi versions do not have a GPS. The other reason is for more accruacy due to WAAS/EGNOS. For some reason none of the phones use the correction satellites. It makes a substantial difference for caching.

It does on a a 64S. The bulk charging uses 450 mA. Near the end, it cycles 710 mA to 150 mA. When complete, the charging animation stops and the draw is 150 mA, which I assume is what is needed for the screen. My suggestion is to connect a power meter and see if it actually does stop charging and it is just a software issue of not showing it.

That driver is not applicable to this device. It has a serial port. The OP needs a USB to serial cable with a driver that works with Windows 10 and then he can use Mapsource or such to transfer waypoints.

For what you are doing, it is probably not worth it. If you are doing hiking or backpacking, the iPhone is a pain due to the battery life and fragile nature. They are also not as accurate, but for most people it does not matter much. Now, if you are comparing to a ruggedized, long battery life phone, it is a different comparison.

It should work. I still communicate with much older units. You just need a suitable USB to serial cable. There are many that work with Windows 10. Of course, you can get an Etrex 10 for $70, so you should weigh the money into a new adapter and the hassle plus you get a lot more useful caching features.

To end the argument on 3 versus 4, I pulled out my GPS38. It takes five minutes to lock, so you have time to see what is happened. With three locked, it reports "2D" with an EPE of 38 meters. Compared to the 64S, the coordinates are 0.004' and 0.005' different, with elevation 207 feet different. Close enough for most uses and much less than 38 meters. When it gets the fourth satellite, it shows "3D" and the EPE drops to 25 meters shortly after this photo.

No. I was answering your specific question.

On road routing is a different distance than off road.

10 satellites is fine. It is when you are in the mountains on the side of steep slope in heavy tree cover. You get down to four satellites with a ton of multipath and your accuracy goes out the window. When you can then see another four Glonass birds, it makes a huge difference.

The extra satellite system(s) do not improve normal accuracy. What they do is provide more satellites to see. In some situations, with marginal coverage, this can improve accuracy.

FYI, It is a slow charge. It takes something like 12 hours. There is also no charge level indication. If you want a fast charge, you need a separate charger. edit: I also think there is power wasted for the screen. What I might do is a power usage test on a full charge.

The GPS has a built in charger.

Sure, you can do that. The only problem is that it does still draw power after the charging is complete, IIRC, so would drain the battery if you left it plugged in.

Sure, why not? you can also use filters on the GPS, if you want to simply filter certain types.

Personally I just use the rechargeable battery pack. It charges when plugged in and is ready for use. It lasts more than a day. If it is a multi day trip, carry NiMH AAs. Lithiums and alkalines are just spending money that is not needed.

The GPS cant know the time accurately enough. All that it looks at to determine location is the difference in time between the reception of the signals. In essence, it knows that satellite A is x meters further away from itself than satellite B. The radius of the spheres are unknown, but one is a known amount larger than the other. From a calculation perspective it is simpler. You have four unknowns x, y ,z and tc. If you assume z to match the last altitude, then you can drop to three and use three equations. ttps://www.courses.psu.edu/aersp/aersp055_r81/satellites/gps_details.html The error in position location due to the use of the incorrect altitude is not great. Too large for cache finding, but close enough for figuring out where you are located.

Oh man. If I try that phone, I'm going to need to help fix OSM.... West Bragg Creek Trails. OSM, SATM and BRMB 8.0. The OSM is a mess. Dead end trails. Trails on top of trails. Ugg. OSM SATM (These are all correct..) BRMB 8.0 Really out of date.

You need three as stated to have one definitive lines in space. With two, you have a choice of two lines. You can solve it, but you get two possible solutions.

Yes. I already stated that earlier. However, as also mentioned....manufacturers such as Garmin, as referenced....will provide a location fix with three satellites. The error in the clock is only whatever change happened since it last had a signal. Thus the timing error becomes dependent on the time since last use and the accuracy of the internal clock. In today's world. none of this matters as modern units wait for four satellites and normally lock on many more within seconds and you never see this. Perhaps, I'll video the GPS38 as it acquires signal as it takes 10 to 15 minutes... You can watch it show the location with three satellites.

Yes, you can solve for two coordinates. A line without solving for Z. It is simple high school math.

My degree in mathematics says otherwise. 3 satellites provide a hoziontal (2D) location. Four to give altitude (3D). With 3 satellites, they assume altitude.