Charging devices on long trips - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 40 Old 03-07-2016, 03:38 PM Thread Starter
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Charging devices on long trips

How do you charge all of your device(s) on long trips?

I have a 12v accessory outlet and a usb adapter for charging my cell phone. However I also have a NIKON and a GoPro and my SENA that all will need charging.

I will be camping most nights (10 out of 16) so I won't always have a wall outlet at night

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post #2 of 40 Old 03-07-2016, 03:52 PM
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I'm not sure about the rest but I've charged my Sena overnight on my bike without issues. My 12V outlet is powered directly off the battery so I just plugged in the USB adapter and let it go.
You might consider putting another plug somewhere near the back of the bike (under the seat is a popular place) so you can run cords into any luggage you might have to charge them while you're riding.

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post #3 of 40 Old 03-07-2016, 04:11 PM
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I just use a Battery Tender USB adapter right off the battery. was $10 off Amazon. Plug in and ride away.

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post #4 of 40 Old 03-07-2016, 04:23 PM
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I always pack 2 or 3 of these power banks.



They can only get my phone to 3/4, but still very handy when you can't find a place to charge on the road (or when it rains and you don't want to expose wires).
They sell them at the dollar store here, 3$ a piece.
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post #5 of 40 Old 03-07-2016, 04:25 PM Thread Starter
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There should be no concerns charging 2 devices at one time? I know these bikes don't have a lot of spare power. I actually have a spare lead I could setup to run to the rear of the bike.

Also, charging the SENA overnight with the bike off... this won't drain the battery?

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post #6 of 40 Old 03-07-2016, 09:26 PM
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My GPS is hard wired to the battery.

I never use the power socket on my dash.

I fitted a power port in my top box, I can charge while on the move or while stopped and everything is secure.

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post #7 of 40 Old 03-07-2016, 09:32 PM
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I use the RAVPower charger and it works superbly. It's with me everywhere I go. I can charge things (cell, pad, etc.) 6X before needing to recharge it. Highly recommended! I also have 12V wired switched to run the GPS and outlet for phone/iPod.

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post #8 of 40 Old 03-07-2016, 09:37 PM
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Quote:
Originally Posted by Bowtie2bimmer View Post
There should be no concerns charging 2 devices at one time? I know these bikes don't have a lot of spare power. I actually have a spare lead I could setup to run to the rear of the bike.

Also, charging the SENA overnight with the bike off... this won't drain the battery?
I charged both my phone and my Sena every day on a 10 day camping trip - after the bike was parked for the night. Never drained the battery...
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post #9 of 40 Old 03-07-2016, 10:00 PM
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http://themicrostart.com/products/micro-starts/

Some people use these (or similar) and claim good results. I have one but have not used it for recharging. Can't think why it wouldn't work though. Sure works well for jump starting (DAMHIKT).

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post #10 of 40 Old 03-07-2016, 10:22 PM
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Quote:
Originally Posted by Bowtie2bimmer View Post
There should be no concerns charging 2 devices at one time? I know these bikes don't have a lot of spare power. I actually have a spare lead I could setup to run to the rear of the bike.

Also, charging the SENA overnight with the bike off... this won't drain the battery?
People's experience can be a guide for this, but here is a simple calculation to show where charging 2 devices should get you.

Bike battery total energy at full charge, (a 14 Amp*Hour battery at 12.5 V average over the discharge curve at low current) : 14 AmpHour * 3600 seconds/hour * 12.5V = 630 thousand Watt*Seconds (aka Joules)

Cell phone battery energy at full charge, (a mondo 3000 mAH or 3.0 Amp*Hour battery at 3.7 V nominal) : 3 AmpHour * 3600 seconds/hour * 3.7V = 40 thousand Joules

If you had a perfectly efficient charger and the cell phone wasted no power when charging the battery (and if batteries gave back all the energy put into them), then your fully charged battery could charge 15.7 phones with mondo batteries. By the time you account for charger inefficiency, the phone dropping 5V down to 3.7 dissipatively, and batteries taking more energy to charge than they give up upon discharge, you have to adjust that phone count downward by a factor like 0.8 * (3.7/5) * 0.9 = 0.53, you are down to 15.7 * 0.53 = 8.3 phones. (The 0.9 figure for charge/discharge efficiency is conservative for low current discharge, such as when running little chargers.)

Start with a half-charged bike battery because your heated gear keeps the charging system from getting the battery to full charge on a long ride, and you could find that fully charging 4 dead phones overnight would nearly deplete the battery.

Did you say 2 devices? Unless they are much worse power pigs than a modern cell phone / wanna-be computer, you should still have plenty of energy left to get your bike started in the morning.

BTW, your Sena headset has a far smaller battery than a modern cell phone. It is of no consequence in this energy management issue.
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