DC charging a Samsung tablet......-gctid815070

[Landin]

To all those who can offer comments, much appreciated! I'm at a loss.....

So... I installed a DC 5amp usb charger.... plugged the tablet in and it won't charge (red "X" over the battery icon)... specs of Samsung tablet indicate 2amp is sufficient for charging...

I tried to charge it in my truck with a 2.1 amp charge... again, red X appeared.... using the factory charging cable.

I tried a different (much newer) Samsung tablet and same result....no charge....and red X....

Am I missing something here... as I have read numerous ppl have navionics on their tablet and charge it via boat usb...

Nervous to spend some bucks on a new tablet that I won't be able to charge out on the sea :/

Cheers to all and thanks to those who help

[Guest]

Try using a different cable. On my iPad and iPhones the cables will quit working over time. The inexpensive eBay cables might only last a month or two. Expensive "certified" cables and Apple branded cables might last a year or more. Try it and let us know what happens.

[Car2n]

"robster_in_edmonds" post=815074 wrote:
Try using a different cable. On my iPad and iPhones the cables will quit working over time. The inexpensive eBay cables might only last a month or two. Expensive "certified" cables and Apple branded cables might last a year or more. Try it and let us know what happens.

I agree. I don't have any problems charging tablets or phones.

I've heard of cheap cables that lack the wire to transfer power. Just the ones to transfer data.

[Landin]

The cable works fine when plugged in AC wall outlet... hmmmmmm.....

This is strange! Not really a fan of using a tablet manufacture outside Samsung....ipads need a data connection for GPS (lame)...

[Car2n]

Two different tablets, two different 12v sockets and it does charge using that cable on an AC source?

Yeah, that is strange.

I've got nothing,,,,

I wouldn't blame Samsung though.

[builderdude]

"Landin" post=815080 wrote:
The cable works fine when plugged in AC wall outlet... hmmmmmm.....

This is strange! Not really a fan of using a tablet manufacture outside Samsung....ipads need a data connection for GPS (lame)...

Nope, just iPads that are wifi only will require an alternate gps source. The iPads set up for cellular connectivity have gps chip inside. Ask me how I know :silly:

Is a bit strange the issue your having, does a little cell phone charge on your new USB outlet?

[Landin]

Hi Dave, indeed; my phone (samsung), wife's phone (iphone) all charge without incident.... I think the next step I'll take is to test the usb charger output amperage to make sure it's maintaining the a min. Of 2 amp... I also have two separate usb chargers, each independent power supply between upper and lower helm..

(Hard head scrarch)

[Landin]

"builderdude" post=815084 wrote:

"Landin" post=815080 wrote:
The cable works fine when plugged in AC wall outlet... hmmmmmm.....

This is strange! Not really a fan of using a tablet manufacture outside Samsung....ipads need a data connection for GPS (lame)...

Nope, just iPads that are wifi only will require an alternate gps source. The iPads set up for cellular connectivity have gps chip inside. Ask me how I know :silly:

Is a bit strange the issue your having, does a little cell phone charge on your new USB outlet?

So.... if the ipad has an input for a cellular data card. The gps chip will work independently without any sort of internet connection???

[builderdude]

The iPad's that are sold "cellular ready" will have a built in GPS chip. Nothing needs to be added and no internet, cellular or wifi connection is needed. The iPads that are sold "wifi only" do not have the internal GPS chip and will not work without additional hardware. I'm using an older gen 3 iPad that has the ability to work on a cellular network but for a year I used it with Navionics without adding it to my cell plan, no wifi no internet.

[kevinv123]

Is it possible your input voltage is incorrect or wrong polarity?

[Landin]

"builderdude" post=815113 wrote:
The iPad's that are sold "cellular ready" will have a built in GPS chip. Nothing needs to be added and no internet, cellular or wifi connection is needed. The iPads that are sold "wifi only" do not have the internal GPS chip and will not work without additional hardware. I'm using an older gen 3 iPad that has the ability to work on a cellular network but for a year I used it with Navionics without adding it to my cell plan, no wifi no internet.

Great info. Thanks! Perhaps I will leave the dark side and return back to an apple product again (If I can get it to charge, I'm sold!!!)

Cheers!

[Landin]

"kevinv123" post=815126 wrote:
Is it possible your input voltage is incorrect or wrong polarity?

Hi Kevin, I have succcess with charging other electronic devices... just seems to be isolated to Samsung tablets.... I love the advice I got from Best buy...."it needs to be a certified Samsung USB charger" I ask "does Samsung even sell something like that?" Response "I have no idea"..... :huh: :silly: :huh: :silly:

[Framedtrash]

You can download a app from the play store called Ampere

This will show you the Ma your device is currently charging at

Simply plug your device into the charger and open the app and it will show you the charge rate

I'm guessing your problem is the chargers you are using

[mlewis100]

"Landin" post=815130 wrote:

"kevinv123" post=815126 wrote:
Is it possible your input voltage is incorrect or wrong polarity?

Hi Kevin, I have succcess with charging other electronic devices... just seems to be isolated to Samsung tablets.... I love the advice I got from Best buy...."it needs to be a certified Samsung USB charger" I ask "does Samsung even sell something like that?" Response "I have no idea"..... :huh: :silly: :huh: :silly:

Funny enough I discovered this as a solution through the same issue. I plug the Samsung tablet into the AC Samsung 2 amp fast charger (on the inverter) and it keeps up with the relatively excessive power consumption of using real-time tracking on Navionics. Other 2 amp DC chargers seem to fall behind but only when using Navionics. The Samsung fast chargers I believe employ a feed back for battery temperature to allow the charging to apply as many amps as possible until they start to heat up to a certain threshold. I guess Samsung pushed this too far with the Note 7 last year in that department hence them catching on fire! (I'm sure there are other factors)

I use my tablet on the fly bridge exclusively. I have also found after not too many months I have to replace the cable as they start to corrode from the salty air and charging slows. Not sure if this has happened to a Samsung cable, there is a quality difference between cables that is sometimes noticed when charging.

[ardoski14]

I've had similar issues when charging my iPad and always seems to be a cheap or bad cable. I have an older iPad 2 (last with old connector) and use the Bad Elf GPS. When using Navonics with either the Bluetooth GPS or plug in it has to be on its own dedicated power source. We cannot use a dual USB plug for another device.

Bad Elf GPS Products