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Discussion Starter · #1 ·



Hi! I bought the USB power supply in the picture above, and connected it directly to my battery. I want to be able to use my phone as a GPS so I need to keep it charged on long rides. The issue I am having is that after installing the USB power supply and then connecting my iPhone, the phone indicates that it is being charged, however, the charge percentage will not go up. I tested this several times riding around the city, while running the GPS app, the battery charge on my phone slowly went down, and while the phone was off, the charge percentage stayed constant. Both times, the phone had an icon indicating it was being charged.

Does anyone know why this is happening? Is it because the battery of the ninja 300 will not output enough power?

P.S. I also tried installing it to a switchable power source like the tail light, I had the same issue.
 

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Your phone isn't receiving enough amperage from the charger to actually charge it. WHile the charger is giving it some power (which is why it's draining slowly) It doesn't have enough to actually charge it.

I'd recommend getting these.
 

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Discussion Starter · #3 ·
Thanks for the quick response Michael V!

If the phone isn't receiving enough amperage from the battery while it's directly connected, won't I have the same problem of not getting enough amperage after using that other product?
 

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Thanks for the quick response Michael V!

If the phone isn't receiving enough amperage from the battery while it's directly connected, won't I have the same problem of not getting enough amperage after using that other product?
No, the battery has more than enough power to charge the phone as well as power many other electronic devices but it's the power adapter/charger you are using that is the problem.
 

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Discussion Starter · #5 ·
Ah I see. Just as a side note, if nothing is connected to the outlet and I leave the bike in storage for a few months, will the fact that this apparatus is connected directly to the battery cause the battery to drain?
 

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Try to use another USB cable.
 

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Ah I see. Just as a side note, if nothing is connected to the outlet and I leave the bike in storage for a few months, will the fact that this apparatus is connected directly to the battery cause the battery to drain?
I think not... if you leave the cable attached even w/o being hooked up to a device I think it'll still draw, but if you just leave the empty outlet attached to the battery it should be fine. Then again if you're leaving it for months you should attach a battery tender anyways.
 

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Discussion Starter · #9 ·
The USB cable I'm using to connect to the power supply I installed is the standard one that came with the phone, and it works perfectly fine plugged into the computer or the wall.

Also, in reference to the fact that my current USB charger may not be receiving enough amperage from the battery, I found that it has the following specifications:

Input voltage: 12V-24V ± 4.0V
USB (output) voltage: 5V ± 0.25V
Output Current: 2.1A
Cable length: 1.83m
Insurance: 7.5A

Given that, shouldn't it have plenty of amperage output? Is it possible that there is another reason why my phone's charge percentage won't go up when it's connected to the motorcycle? Perhaps I have to be riding at a certain RPM for the motorcycle battery to be providing enough power, is that possible?
 

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What is the rating of the fuse? It should be about 2a or higher. I found that sometimes things just don't like to work together. I.e. In a cheap cig lighter socket to usb, using the Samsung cable I got a notification saying I am hooked to a slow charger. Use a cheap cable I got with one of those power packs though and it charges fine. Though most phones draw 2.1a so the socket will have to supply as much
 

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Discussion Starter · #11 ·
I'm guessing the rating of the fuse is what the product manufacturer called insurance, which would be 7.5A.
 

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Discussion Starter · #13 ·
Do NOT install a USB power outlet connected directly to your battery.

It will drain your battery if bike is left alone for longer than a few days.
 

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Do NOT install a USB power outlet connected directly to your battery.



It will drain your battery if bike is left alone for longer than a few days.

Yes, yes it certainly will. You always want to run these through a fuse. I've been using an Optimate for my iPhone for several months and even using the phone as a GPS and music source, it stays fully charged while I'm riding.
 

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I think not... if you leave the cable attached even w/o being hooked up to a device I think it'll still draw, but if you just leave the empty outlet attached to the battery it should be fine. Then again if you're leaving it for months you should attach a battery tender anyways.
Just a quick note, the USB cable is pretty much nothing more than just wires. There are 4 connections, VCC (power), GND (ground), D+, and D- (data). With no active circuit in the cable, plugging it in to the charger will not cause any power draw unless a device is connected. It's the same as an empty outlet.

It should be noted that a typical USB charger will used a DC-to-DC converted to create the +5.0VDC output from the +12V input. Whether or not something is plugged into the charger that DC-to-DC converter will be running and consuming power. With no device attached, a USB charger will draw current and eventually drain your battery as the OP has unfortunately found out. A fuse will not prevent this. The only way to stop the draw is to 1) have a smart charger that knows when a device is plugged in and then turns on its charging circuits, or 2) disconnect the USB charger from your battery.

The USB cable I'm using to connect to the power supply I installed is the standard one that came with the phone, and it works perfectly fine plugged into the computer or the wall.

Also, in reference to the fact that my current USB charger may not be receiving enough amperage from the battery, I found that it has the following specifications:

Input voltage: 12V-24V ± 4.0V
USB (output) voltage: 5V ± 0.25V
Output Current: 2.1A
Cable length: 1.83m
Insurance: 7.5A

Given that, shouldn't it have plenty of amperage output? Is it possible that there is another reason why my phone's charge percentage won't go up when it's connected to the motorcycle? Perhaps I have to be riding at a certain RPM for the motorcycle battery to be providing enough power, is that possible?
Typically that should be sufficient to charge your iPhone. However, there's a minor problem with iPhones (and other smart devices):
"To charge devices quickly, the charger must support the data handshaking protocol required to support USB 2.0 BC1.2 and Divider Mode devices such as iPod® and iPhone® to allow charging currents as much as four times greater than USB 2.0 allows. Without this handshaking protocol, many handsets and smartphones on the market fail to charge."
If the charger doesn't support the 3 basic types of USB charging ports as defined by the USB 2.0 Battery Charging Specification 2.1 then it's possible you're not taking advantage of the full charging capabilities of your charger.

My first guess is if you shut your phone off and plugged it in it would charge just fine. Without a charger that supports the higher current charging spec. your phone may be limited to the 0.5A that you get with Standard USB2.0 Downstream Port. Your charger may even be able to charge the phone with the phone being on, but when the GPS is turned on power consumption goes beyond the capacity of the charger and you're phone will show it's charging but the battery will eventually go dead.

If I had to guess at what's wrong I'd guess it's the inexpensive charger that's the problem.
 

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Discussion Starter · #16 ·
I just wanted to put the big warning for newbies like me so they avoid the mistake. I rode my bike around for a few hours and charged the battery, and uninstalled the USB charger completely. I'm just going to buy a 20000 mAh power bank and put it in my tank pad, it'll be enough to re-charge anything multiple times so no need to have an on board USB slot.
 

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Has anyone tested run into the same issue with the Battery Tender brand USB port? Have an iPhone 6 running Apple Maps and bluetooth music to a headset - battery drains very quickly.
 

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sorry for posting without googling if what I'm saying is correct, but I distinctly remember that apple devices sometimes do not charge from usb unless it's an apple usb. for example, I'm quite sure if I connect an ipad to my computer's usb it won't charge, it wants to be connected to its own wall usb charger. so the problem might be your iphone, not the charger.
 

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Hey Berkies -

Just go with the OptiMate USB cable that Michael V recommended (1st response to your post). I had the exact same issue as you: iPhone 6 using GPS and streaming music and my Battery Tender Brand USB port wasn't giving the phone enough juice. The OptiMate works perfectly.

User Malice also suggested getting a non-data cable for charging purposes. The difference being that a non-data iPhone cable has two of the four USB connections: positive and negative. A regular iPhone cable has positive, negative, and two data connections. I CANNOT tell you why the data cable would interfere with power. But user Malice said he switched from his data cable to a non-data and he saw increased charging times.

This is a link to my post regarding the OptiMate cable (links included): http://www.kawasakininja300.com/forum/9-ninja-300-parts-accessories/97825-optimate-usb-port.html

Good luck -


Doug
 

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Here's my setup. One USB is enough. The double USB is tough to mount inconspicuously.
 

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