Portable Power Supply / Pure Sine Inverter

[fruitygreen]

@fruitygreen said in Portable Power Supply / Pure Sine Inverter:

This might be an alternative.
No saving feature, but compact and cheap.
You need a meter to see voltage and current . Independent V & I adjustments.

https://www.google.com/search?q=dc+to+dc+300watt++booster+converter++compact&client=ms-android-att-us&sa=X&biw=360&bih=560&noj=1&tbs=vw:l,ss:44&tbm=shop&srpd=13657546638593646805&prds=num:1,of:1,epd:13657546638593646805,qv:1&ved=0ahUKEwjpjJeQgJPSAhXhw1QKHSL8BiYQgjYIvQI

Okay this is what I'm talking bout.
https://archive.owforum.co.uk/topic/2935/diy-mobile-supercharger

The boost controller cr4p used appears similar/or same but different brand. Anyways this setup is a lot more efficient physically and electronically than an inverter type charger.

[wr420]

Here is where I got the idea from for the solar controller. 40$ on amazon.

https://archive.owforum.co.uk/post/24289

[ZeeMox]

Would that solar controller work with this battery?
https://www.amazon.com/gp/product/B01LWOW6V3/ref=ox_sc_act_title_7?ie=UTF8&psc=1&smid=A1HG0SD62RRE2I

It's a great price for a lightweight 42000mAh, but after reading every thread that crops up about this, I'm still unclear about exactly what I should be looking for in terms of output.

Also, I would steer clear of that Plug thing until it comes out. It may well be a great product, but from the comments in the campaign page, it looks like they're behind and have poor relations with their current customers. Also, some of their associated projects are similarly behind, at least one that I found even moreso. Best to see if they can make good on their claims before tossing money into the wind, imo.

[wr420]

@ZeeMox - My guess would be no because I tried something similar and it did not have the type of capacity it claimed. It was one of those li-po/li-ion car jumpstarters. My recommendation is that you don't want anything between the battery and the charger, and all these little handheld packs have electronics between the plugs and the batteries inside.

Also I think you want the source battery voltage to be as high as possible but not over the voltage of the OW's battery so the 32-42v range works well and are available.

[fruitygreen]

@wr420
42Ah is plenty power, however as wr420 have mentioned "and all these little handheld packs have electronics between the plugs and the batteries inside." the advertised power might come with some caveats. Maybe the 42Ah is a accumulation of all usable ports.

The discharge rate is a factor and without knowing what the battery specs are we can only measure what comes out of it. Maybe the bare battery have potential in it. Pun intended.

[gio.lyfe]

@wr420 Ah! I get it now. Thanks! Great thread!

[gio.lyfe]

@wr420
So I'm trying to make the wiring for the solar controller setup as easy as possible for all of us. Please let me know if this will this work. I am trying to avoid soldering and mistakes.

Here is a link for an already made xlr Female to XT60 Male converter:

https://lunacycle.com/xlr-f-to-xt60-m-convertor/

For the rest of the wires I was just gonna use XT60 connector sets with pigtails like this:

https://lunacycle.com/batteries/connectors/xt60-set-connectors-with-pigtails/

Then, adding terminal spades to the ends of the XT60 wire like this (to connect xt60 plugs to solar controller):

https://www.amazon.com/Gardner-Bender-10-113-Terminal-Spade/dp/B000BW0YUS/ref=pd_sbs_328_2?_encoding=UTF8&pd_rd_i=B000BW0YUS&pd_rd_r=S5FVQC7FRFAG836DV5JQ&pd_rd_w=iuIRy&pd_rd_wg=G3yT3&psc=1&refRID=S5FVQC7FRFAG836DV5JQ

As for the hoverboard charger, for charging the external samsung hoverboard battery pack, I think it needs have its plug replaced with a male xt60 connector with couplers like this:

https://www.amazon.com/Install-Bay-BVBC-Connector-100-Bag/dp/B0058TX6NQ/ref=sr_1_15?s=hi&ie=UTF8&qid=1487269842&sr=1-15&keywords=wire+connectors

What do you guys think of the parts in the links? I want to use these parts to have all my wiring and connections for the solar charger and hoverboard battery pack you guys recommended in the links above. Lets make some portable chargers and ride out!

[ZeeMox]

@wr420 said in Portable Power Supply / Pure Sine Inverter:

@ZeeMox - My guess would be no because I tried something similar and it did not have the type of capacity it claimed. It was one of those li-po/li-ion car jumpstarters. My recommendation is that you don't want anything between the battery and the charger, and all these little handheld packs have electronics between the plugs and the batteries inside.

Also I think you want the source battery voltage to be as high as possible but not over the voltage of the OW's battery so the 32-42v range works well and are available.

Drat. I thought said handheld packs were the way to go with the solar controller after reading the Andy thread. Those extra electronics are handy for people with less experience like myself. I can handle soldering and wiring but I don't know enough about batteries to confidently put together a charger completely from scratch. What are you guys using with the controller?

[wr420]

@ZeeMox - Something like this will get yo about 1.5 charges.

[sonny123]

@wr420

Nice find.
Pick up 2 and get 3 charges.

I also like this idea. Save you from getting inverter and carrying the charger with you.

https://www.amazon.com/RioRand-controller-Regulator-Controller-Adjustable/dp/B01DTT7CH2/ref=sr_1_13?ie=UTF8&qid=1487282019&sr=8-13&keywords=mppt+solar+charger

[wr420]

@sonny123 - Yep that's the ticket. $10 cheaper

[OneWheelNoob]

Someone should post a video tutorial doing this. I'm lost as hell lol.

[Snurfer]

So let me get this straight. You are talking about using the super charger to charge up an external battery pack through a solar inverter so that all u need to take out into the field is the battery pack with the appropriate adapters to hook straight to the onewheel? Please feel free to set the record straight for those of us more inclined to understand sticks and rocks.

[sonny123]

@Snurfer

Lets say you have a 36V bicycle lithium battery and you want to charge from it. Typically, you'd get an inverter similar to this.

http://www.ebay.com/itm/300W-1500W-Pure-Sine-Wave-Solar-Power-Inverter-12-24V-48V-To-110-220V-50-60Hz-/321479905632?var=&hash=item4ad9b21160:m:m7ReLblkM31H95uuvH6_T4A

and charge using your OW charger. But that would be many things to handle.

You can replace the OW charger and inverter with this

https://www.amazon.com/gp/product/B01HCL7LEW/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=A3U3JJYGD7YYL1

You will need to make a plug that's the same as the one on OW charger.

That's probably the lightest setup.

[wr420]

@Snurfer - not sure if you can use this solar charger to charge your 36v pack with the higher 58v the OW super charger puts out.

I think this style of charger only works well when charging a higher voltage battery with a lower voltage source. I have used a few different power supplies to charge the 36v packs. I have found that a @6 amp 12V source works well. The solar charger is very flexible, so you can set your input voltage anything under 30v or so and you should be ok(charging a 36v pack). Just make sure it can supply @6 amps. Old laptop power supplies CAN work but desktop power supplies have more than enough. You can also look at this hobby lipo charger power supply. Not bad for $10.

You can use the power supply I linked to(or something comparable) as an input to the solar charger to charge a 36v pack.

[No]

@OneWheelNoob said in Portable Power Supply / Pure Sine Inverter:

Someone should post a video tutorial doing this. I'm lost as hell lol.

Yea...

[fruitygreen]

@wr420 said in Portable Power Supply / Pure Sine Inverter:

@Snurfer - not sure if you can use this solar charger to charge your 36v pack with the higher 58v the OW super charger puts out.

I think this style of charger only works well when charging a higher voltage battery with a lower voltage source. I have used a few different power supplies to charge the 36v packs. I have found that a @6 amp 12V source works well. The solar charger is very flexible, so you can set your input voltage anything under 30v or so and you should be ok(charging a 36v pack). Just make sure it can supply @6 amps. Old laptop power supplies CAN work but desktop power supplies have more than enough. You can also look at this hobby lipo charger power supply. Not bad for $10.

You can use the power supply I linked to(or something comparable) as an input to the solar charger to charge a 36v pack.

Surely you can charge a 36v pack with a 58v OneWheel UltraCharger (with the proper connections and no other electronics).
Think of Voltage as pressure. You need more to overcome the pressure of the other. If pressure is not higher and constant than it will result in equalization. So the OW charger which is higher voltage will charge a lower voltage battery.

But a multi-cell lipo would need a balancer . AKA " BMS" so all cells gets charged evenly and know when to shut the charge off.
http://liionbms.com/php/bms_options.php#BMS_types.

https://archive.owforum.co.uk/topic/8/keeping-you-in-the-game
Quotes from above link
"Any best practices for charging?
No need to overthink charging - plug it in when you're low and be back in action in no time. You actually can't overcharge your board so there's no harm leaving it on the charger overnight. If you are going to be leaving your board in the garage for a while be sure to leave it fully charged."

I do believe the OneWheel has a BMS inside of the board. The high Voltage 58.4 of the Ultra-Charger and 3.5 Amps are numbers that we can use to calculate the Charge rate of the OW Battery pack .More tech for later but just remember higher voltage can charge lower voltage.

This whole thing is a lot simpler than it is explained so far.
Lets wait to see who can make a good DIY write-up.

[cr4p]

@fruitygreen said in Portable Power Supply / Pure Sine Inverter:

The boost controller cr4p used appears similar/or same but different brand. Anyways this setup is a lot more efficient physically and electronically than an inverter type charger.

i would not recommend the one i used. i have two of those. alltough it works and you can use it to charge, it still is slightly beyound it´s limits. the result is, that it gets quit hot and you have to slightly cool it, and that it takes about 50 minutes for a charge (because it does not deliver the full 3.5amps.

[timvdp]

@cr4p said in Portable Power Supply / Pure Sine Inverter:

@fruitygreen said in Portable Power Supply / Pure Sine Inverter:

The boost controller cr4p used appears similar/or same but different brand. Anyways this setup is a lot more efficient physically and electronically than an inverter type charger.

i would not recommend the one i used. i have two of those. alltough it works and you can use it to charge, it still is slightly beyound it´s limits. the result is, that it gets quit hot and you have to slightly cool it, and that it takes about 50 minutes for a charge (because it does not deliver the full 3.5amps.

Really??....I'm having one made right now from a clone's battery :(:(:( everybody sounded really happy about this set up I thought...:(

[fruitygreen]

@cr4p said in Portable Power Supply / Pure Sine Inverter:

@fruitygreen said in Portable Power Supply / Pure Sine Inverter:

The boost controller cr4p used appears similar/or same but different brand. Anyways this setup is a lot more efficient physically and electronically than an inverter type charger.

i would not recommend the one i used. i have two of those. alltough it works and you can use it to charge, it still is slightly beyound it´s limits. the result is, that it gets quit hot and you have to slightly cool it, and that it takes about 50 minutes for a charge (because it does not deliver the full 3.5amps.

Well there we have it, an actual usage and review of the device.
RioRand Solar Charge Controller then maybe the better choice. Anyone with a review on it?

[jnollz]

This post is deleted!

[ZeeMox]

@wr420 said in Portable Power Supply / Pure Sine Inverter:

@Snurfer - not sure if you can use this solar charger to charge your 36v pack with the higher 58v the OW super charger puts out.

I think this style of charger only works well when charging a higher voltage battery with a lower voltage source. I have used a few different power supplies to charge the 36v packs. I have found that a @6 amp 12V source works well. The solar charger is very flexible, so you can set your input voltage anything under 30v or so and you should be ok(charging a 36v pack). Just make sure it can supply @6 amps. Old laptop power supplies CAN work but desktop power supplies have more than enough. You can also look at this hobby lipo charger power supply. Not bad for $10.

You can use the power supply I linked to(or something comparable) as an input to the solar charger to charge a 36v pack.

Thanks for clarifying all this stuff. This is really helpful. Only thing I'm still not super clear about: How do you wire up all these different chargers to/from those solar controllers? Making the XLR plug makes sense to me after seeing the pics posted in the Andy thread, just not sure what I'm looking for to provide input/output to/from the solar controller itself.

[wr420]

I tried to make a video before I just left town up I ended up filming it upside down lol. (New phone).
Ill redo it when I get home or try to flip in somehow.
This guys video gives a good overview of how it works and config'd etc..
You want the output set to 58v and 3.5A.
Set input to what ever voltage you are using.

[OneWheelNoob]

@wr420 Did you ever get around to making that video?

[thegreck]

@wr420 said in Portable Power Supply / Pure Sine Inverter:

I tried to make a video before I just left town up I ended up filming it upside down lol. (New phone).
Ill redo it when I get home or try to flip in somehow.

If it's an iPhone, there's an app for that.

[timvdp]

just 1 xlr plug
and 1 black red conector for the battery

[Earthpilot]

Found this 2 days ago
https://www.youtube.com/watch?v=Q8fI2PrXy-8

[Pod]

I snagged one of the opening hours.

Check out RIVER: Your Mobile Power Station & Solar Generator on #indiegogo!
http://igg.me/at/riverpowerstation/x/16465340

[EzEarrl]

@Dirk Yep you sure can. I have a 400W inverter in my truck that plugs in to the 12V outlet in the back. You do need to have the engine running if vehicle battery voltage drops below 12.6V.

[Snurfer]

@Earthpilot that setup used in conjunction with the external battery pack to solar booster to direct charging would be my ideal setup. I may put an effort at setting that up and documenting it.

I'm looking for a good safe battery pack to use, lifePo4 if possible. Do you need a BMS for the charging of the battery pack?

I would just buy a OW battery pack in the housing if that were an option lol.

[noahsw]

Here is what I could put together from all the old threads. I'd love an expert to chime in here! @timvdp @wr420 @cr4p

Parts

• Solar power booster - https://www.amazon.com/dp/B01HCL7LEW/ref=wl_it_dp_o_pC_nS_ttl
• XLR-F to XT60 converter - https://lunacycle.com/xlr-f-to-xt60-m-convertor/
• XT60 connectors with pigtails - https://lunacycle.com/batteries/connectors/xt60-set-connectors-with-pigtails/
• Battery pack - http://www.ebay.com/p/36v-4-4ah-Replacement-Lithium-Ion-Battery-for-Smart-Board-2-wheel-Scooter/1180968277
• AC power adapter for charging battery (12V 6A) - https://www.amazon.com/ZIUMIER-Switching-Adapter-3-Prong-Transformer/dp/B01MCV1UU9
• DC Female Barrel to XT60 - http://www.ebay.com/itm/12v-DC-Barrel-F-to-XT-60-M-Lipo-Battery-Charger-Power-Adapter-B5-/142329251634?_trksid=p2385738.m2548.l4275

Charging battery
Wall outlet --> DC power adapter --> DC female barrel to XT60 --> female XT60 pigtail connector --> solar power booster --> male XT60 pigtail connector --> battery

Charging OW
Battery --> male XT60 pigtail connector --> solar power booster --> female XT60 pigtail connector --> XT60 to XLR converter --> OW

Notes
The downside to this approach is the solar booster is used for both charging the OW and the battery. That means changing settings and possibly wire connections. I don't know where to find a "native" charger for the battery though.

[ltl]

@noahsw Perfect set up for charging the onewheel. I use a separate charger for my external accu. I have a 36 volt accu that I can charge with a regular lithium charger. For the colder days I use a lipo6s 22.2 v accu This accu and charger are used for for instance drones, so checkout a shop for that. Works perfect.

[noahsw]

Awesome. Do you have links to your battery and charger? Or pics?

[ltl]

@noahsw http://corally.com/Batteries/Sport-Racing-45C-Li-Po/Team-Corally-Sport-Racing-45C-4500-mAh-22-2V-Competition-Li-Po-Battery-Pack-Stick-Hardcase-12Awg-Wire-T-Plug-Connector8536/

And

http://www.ebay.com/itm/Etronix-Power-Pal-Touch-90W-AC-DC-Performance-Charger-ET0211-/360808173107

And the same 36v as mentioned in your post. The lipo worked better for me on cold days.

[ZeeMox]

You guys are using 4500 mAh batteries? Isn't that insanely low for the OW?

[Earthpilot]

@ltl Can you post a video of your set up?

[markdjr]

Can we get a post on how to wire the xlr please?

[Snurfer]

Has anyone thought of using a Ryobi 40 Volt 2.4 Ah High Capacity Battery with a solar booster to charge the OW?

Would it be possible?

I have three of them laying around for my mower and weed trimmer.

[noahsw]

@markdjr said in Portable Power Supply / Pure Sine Inverter:

Can we get a post on how to wire the xlr please?

My thought was solar power booster --> female XT60 pigtail connector --> XT60 to XLR converter --> OW

[wr420]

My Mom has a E-Go leaf blower with one of these in it. It's so strong my kids use the leaf blower as propulsion for a go cart and it works well. It's 56v at 2Ah, Still, 2 Chinese hoverboard batteries my be a better investment.

[noahsw]

@ltl I'm tying to avoid LiPo because of all the safety issues people pointed out.

The last step is finding a simple Lithium Ion battery pack and charger combo that doesn't require a hoverboard in between.

[ahxe45]

@noahsw don't be afraid of lipo batteries they really are not that dangerous you just have to take care of them. Besides the onewheel I also am heavily into building rc quadcopters, planes and helicopters so I literally have hundreds of lipos ranging from 150 mah 1 cell to 8500 mah 5 cell and have not once experienced an issue "knock on wood." People run into problems with them by buying from unreliable sources and not knowing anything about safe charge rates and proper discharge and storage rates. If you buy a decent charger you really can't screw it up. Another thing people do that have had problems is leaving a lipo battery plugged in for extended periods of time unattended (overnight) on a shotty charger and then wonder why it caught on fire. If you just do a little research you can rig up a powerful portable charger for you're onewheel that is lightweight and pretty cheap compared to other options and most importantly safe.

[noahsw]

Progress... I think I can hook this charger directly up to the 36v battery packs: https://lunacycle.com/36v-4amp-luna-mini-charger/

[Snurfer]

So with these Samsung replacement batteries, do we need to worry about not having a BMS and just relying on the charger? I'm thinking the life of the battery pack would be reduced due to the potential for imbalances.

Anything to be worried about when discharging it through the solar booster to the OW?

[noahsw]

@Snurfer Yeah, I think that's the risk. The guys at Lunacycle said they won't sell batteries without a BMS because of the safety issues. And I've read several stories about shady batteries on eBay. Sigh.

Lunacycle does sell this 52v 5.8ah Mighty Mini ($260). It's probably worth the money for the safety and still only 3 lbs. But I don't know how to hook it up to our OW. The solar booster doesn't list 52v as a supported input.

In general, I'm finding the eBike batteries to be heavy and expensive. The hoverboard batteries have safety concerns. There's got to be a middle ground somewhere...

@ahxe45 appreciate the notes, but just the idea that an overnight charge could catch fire freaks me out ;-) Unless you've got specific suggestions on batteries and chargers?

[ahxe45]

@noahsw hobbyking.com is a good website to buy from. Here are two good articles to read on lipo batteries:

https://rogershobbycenter.com/lipoguide/

http://www.rchelicopterfun.com/rc-lipo-batteries.html

Hobbyking also sells lifepo4 batteries which are the same ones used in the onewheel if you wanted to be extra safe.

https://hobbyking.com/en_us/batteries/lifepo4.html

[noahsw]

@ahxe45 thx! How would I hook up the LiFePo battery to charge the OW?

[wr420]

@noahsw That will work. You should get 4+ charges out of it.

[sonny123]

When charging through the solar charger, does the light on Onewheel stays on as opposes to flashing when using the Onewheel charger?

[wr420]

@sonny123 - the light on the ow acts the same with the solar charger as it does with the ow charger. The more it's charged the longer the light stays on each flash cycle.

[sonny123]

@wr420

Thanks.
I did set it at 58V and 3.5A but my Onewheel is charged and it's freaking raining out.
Anyway, I made a quick video and it's uploading.
Will post it when done.
Hey thanks for recommending that thing.

[sonny123]

https://www.youtube.com/watch?v=sgrbBnoTErU&feature=youtu.be

[atl1wheelin]

I have always thought it would be awesome to do a onewheel camping trip where you can do a totally self sufficient trip carrying a battery charger and going with light weight gear and doing some kind of short documentary on the trip. Hell - bring along a tenkara fly rod. Epic!

[atl1wheelin]

@OneWheelNoob Me too!

[No]

So the ultracharger can be completely replaced with the solar charger? assuming we swap out all the proper plugs? Would there be any disadvantage? it's significantly smaller and cheaper...

[Snurfer]

@No so long as your power source is lower than 58v, such as a battery pack or solar panel. I don't think you could use 110v for example.

[No]

@Snurfer I see, thanks

[noahsw]

@sonny123 thx for the video! What does the OW app say? That might explain the blinking light pattern.

[timvdp]

@sonny123 said in Portable Power Supply / Pure Sine Inverter:

https://www.youtube.com/watch?v=sgrbBnoTErU&feature=youtu.be

Good one...you are the first to post a video to help people see how easy and good the solar charging is
also nice solution for the connector so you don't have to buy or make one!!
nice work and enjoy the extra mobility!!:):)

[timvdp]

@No
battery&charge booster
correct

[sonny123]

@noahsw

It was just an error.
Once I ran it down to 90% and tried again,
it charged the same way like the Onewheel stock charger.

[wr420]

As far as the 110v mentioned above, deffinitly don't put 110v AC into the charger. The charger only works with DC.

[sonny123]

Just tried it with 24V battery.
Video uploading.

[sonny123]

https://www.youtube.com/watch?v=emMBhPxxBW8&feature=youtu.be

[Sean_G_NYC]

Great videos Sonny123!
Do you have a link for the wire harness connections to make the quick connects on the charge cord/Solar/batteries?

[sonny123]

@Sean_G_NYC

Thanks.

I use Andersson Powerpole.

http://www.ebay.com/itm/Anderson-Powerpole-30-Amp-Power-Pole-10-Pairs-/251225966582?hash=item3a7e3c07f6:m:myt96V00IFrq4dyiG_KmvkQ

For the little clips, I just soldered U shape wires to get going.

I'll be cleaning it up with the correct clips.

This guy has a good tutorial on the solar charger.

https://www.youtube.com/watch?v=IfHyPNkxlrU&t=2020s

[parrothd]

@sonny123 said in Portable Power Supply / Pure Sine Inverter:

@Sean_G_NYC

Thanks.

I use Andersson Powerpole.

http://www.ebay.com/itm/Anderson-Powerpole-30-Amp-Power-Pole-10-Pairs-/251225966582?hash=item3a7e3c07f6:m:myt96V00IFrq4dyiG_KmvkQ

For the little clips, I just soldered U shape wires to get going.

I'll be cleaning it up with the correct clips.

This guy has a good tutorial on the solar charger.

https://www.youtube.com/watch?v=IfHyPNkxlrU&t=2020s

Andersson powerpoles, must be an RC hobbyist... :)

[sonny123]

https://youtu.be/RVkehQ_RypI?t=481

[Sean_G_NYC]

@sonny123 Sweet, thanks for the link.
I have all the components ordered up so i should have the portable set-up ready to go next week.

[RandomNate]

Ok so after seeing the video, I am getting closer to getting on board with this. I have some DIY Ebike experience as well as some RC car experience so I am no stranger to the connectors or soldering. I even have a good supply of connectors and heat shrink tubing "in stock" in my garage. I don't have any of my old Ebike batteries, so I need to find something that is a good balance of weight, cost and capacity. I would like to get something that would give me 2 full charges. Recommendations?

[nanjay83]

Today I got a chargetech plug and it works!!

[owBeez]

@sonny123
the MPT-7210A seems to be the so far best approach, there is a detailed review on https://www.youtube.com/watch?v=rC4rF62CHKY -
looks like it can take anything > 8V DC as input! So could be used to charge from a car battery as well.

Also there is a way to configure the charger to start automatically once input power is supplied

[sonny123]

I'm loving this charger.
Manual can be downloaded here.

http://www.mhinstek.com/down/html/?146.html

[noahsw]

@nanjay83 their website says it only supports up to 85W though. OW requires ~250.

[nanjay83]

@noahsw https://www.indiegogo.com/projects/plug-the-world-s-most-powerful-battery-pack-powerbank-solar--2/x/15282123#/ this one? Well my ow charged 90% to 100%.

[noahsw]

@nanjay83 oh I see there are multiple. Which version do you have? How much does it weigh?

[No]

It's on Amazon now

[nanjay83]

@noahsw don't buy it. Jeremy Gavin tested and not recommend it on facebook.

[sonny123]

@nanjay83

Not to mention you'll have to carry the Onewheel charger along.

[No]

I'm glad I picked it up with the 32% discount, but it looks like I'll be getting This + This, seems like the best option at the moment for long rides. The PLUG seems nice for a light-weight option, as long as you don't absolutely have to charge it from 0 to full in one sitting .

[markdjr]

I saw someone on another post about the plug suggesting using a light weight inverter and your choice of 12v battery supply. Seemed like a cheap and versatile solution.

[No]

true, but I think the main advantage of the plug is that it has the greatest power to weight ratio of all options(as far as I know), 54,000 mAh @ 2lbs

edit: gonna run some tests this weekend to confirm the overheating issues, and see how many full charges I can get out of it. One thing I noticed is, the huge capacity takes forever to charge, I ran it down to 0 and started charging it at about 8 hours ago, it's only at 93%

[owBeez]

The kickstarter page says 200Wh, that is the metric to compare. Should be less than 2charges.

[noahsw]

@No I got the same combo and it should arrive tomorrow. Will let you know how it goes.

[No]

This post is deleted!

[markdjr]

@No Amazon lists the 5.4ah plug at 4.5 lbs. Is that inaccurate? Thanks.