Reddit reviews Bicycle Bike Phone Mount Holder, iKross Black Universal Water Resistant Pouch Holster Cover Case with 360 Degrees Rotatable Fits iPhone 7, 7 Plus, 6, 6 Plus Samsung and Android Smartphone Devices

OK, here goes nuttin'.
First of all, some back story. I live in the Philly, PA area and was planning my first long distance trip with my wife to take back roads up to Niagara Falls, then come straight back down into western PA and take the long way (PA Route 6) back. I wanted to make sure that I had a way to charge MP3 players, phones, and power a GPS since most of the trip we'd be on the bike.
I bought THIS USB and 12v power outlet for the handlebars, along with THIS phone case this is supposed to be waterproof. I've ridden with it in some nasty weather, and it was dry enough that my electronics didn't get damaged. Lastly, I mounted THIS dual USB outlet in the right-hand saddle bag. The double sided tape seemed like a good idea, but what came with it wasn't great and really didn't stick to the bag, even though I cleaned everything with alcohol and let it dry before applying. I'd get some good double sided tape and do it over if I still had the bike.
Now, I chose to run the wires for both units to the battery. You may choose elsewhere, it doesn't matter. While I never actually removed the tank, I did remove the 2 bolts by the seat so I could lift the back end and slide the wires under the bracket. Just make sure you don't pinch anyting when you bolt everything back down.
Once all the wires were loosely run, I neeed to power everything. I wanted it all tied directly to the battery, but I wanted the power switched so that it didn't drain the battery if I accidently left something plugged in and forgot about it. I used THIS RELAY UNIT to power everything. Note that this relay package come with the relay, switch, and a ton of wire. You could cut the swtich out of the circuit if you don't want it. I just mounted it in the saddle bag with the USB outlet.
The wiring does take a bit of skill, which really means the right tools and and a little knowledge on how to use them. The first thing I did was find a wire for the relay to trigger. I wanted the relay to power everything only when the key was on. I don't remember exactly how I found it, I think I took the tail light assembly apart and looked at the wire color. I do remember that the wire I wanted was bundled in electrical tape and/or conduit wrap. I know when I removed the tape, I found that the wire was spliced from the factory. This was perfect for me because it meant I didn't have to cut away any more shielding from the wire. I used a volt meter to verify that the wire was only powered when the key was on and then soldered the switch wire from the relay to it. THIS diagram might help with the wiring.
The rest of the wiring was just bringing the positive leads over to the relay and finding a good ground for all of the negative leads. I do remember using the battery negative terminal for all of the negative connections. I just brought all of the wires together and crimped them all in an ring terminal.
I also used a soldering iron and solder on all of my wire connections, and put heat shrink over the connections and then electrical tape. I wrapped all of the wires going to the saddle bag in electrical tape and wire lume so that they would blend in with the frame better and protect the wires better. Also, the USB connection in the saddle back snaps into a bracket that is included with the connector. This means that when you want to remove the saddle bag for cleaning or maintenance, you just unclip the USB connection and remove the bag. I hope all of the helps. Let me know if something isn't clear and I'll try to explain it better.

I'm using an iKross weather-resistant pouch mount on my bike. I don't know if it can accommodate a Mega, but it will take my Note 2 inside its wallet case. It's a snug fit, but the zippers close all the way around.

http://www.amazon.ca/dp/B00JXXFCY4

I'm trying to figure out a way to feasibly mount my phone to my bike handlebars to use as a cycling computer...with caveats.

I know that there are a plethora of phone mounting options out there, but I want to also include a powerbank and I want it to be universal.

The idea is to use an AmazonBasics 10000mAh Power Bank to connect to my phone to keep it consistently charged while on a ride and using it as a cycling computer. This theoretically can be done much much cheaper than something like the Garmin Edge 520 while still getting essentially the same features (minus a few extras that aren't important to me). The problem comes in determining the safest and most feasible way to do this.

There are products like this iKross bike mount that seem to be pretty good, but are too thin to accommodate both a phone and a power bank. There are of course power bank bike mounts for iPhones, but those are only for iPhones and so they are not universal. So I'm looking at maybe doing some Frankensteining to get what I want.

After looking around, my inclination to make the proper mount is to combine this Quad Lock (specifically because it so deeply discounts Strava Premium) and this dry box to create a waterproof, if bulky, case and mount. The Quad Lock allows the case to come off the bike when it's not needed so that my bike doesn't look ridiculous for simple rides around town and also would be secure. I'm not a racing cyclist so weight and aero are not super important.

So, I could use that combination with a clear box, put some rubber padding in, and call it a day. But I wouldn't be able to access the phone screen in this configuration. So a further thought would be to cut a hole out of the top of the dry box that would be large enough for most phone screens and then glue/epoxy a thin piece of plastic that allows interaction with a phone screen (similar to a screen protector). The phone would then be able to be used and also waterproof. One problem I see with this is obviously making sure this seal is waterproof and also if the case for some reason comes off the bike and hits the ground this will be a major failure point.

Is this a feasible project? Am I missing a more obvious solution? I'd appreciate any input as it seems like I could make a case, mount, and power bank all for under $100, 1/3 the cost of a serious cycling computer and likely get much better battery life.

If you want a waterproof one



If you don't need a waterproof one