I have heard the voltage being thrown around as being 56v, but the tech specs are: Onewheel Technical Specification
Motor: 500W transverse flux hub
Battery: Lithium Iron Phosphate (LiFePo4) 48V
Sensors: Solid State MEMS 6-DOF
Tire: 11.5×6.5-6 Vega
Max lean angle: >30 degrees
Top speed: 15 MPH
Typical range: 6-7 miles
Recharge time: 20 mins (ultra charger)
Dimensions: 9×11.5×30 (in)
Weight: 25 lb
Perhaps the charger charges at 56v? Not certain, but FW says 48v. I will test it tonight to see what it reads from the charging jack.
Nicky Skinz last edited by
@Count did you ever get a chance to check that?
I can't pull a voltage from the charging jack. That means there is no possibility of connecting a secondary batter there. I took the bold step of dis-assembling the battery assembly from the onewheel. it is a modular battery encased in plastic and aluminum. it weighs just under 5 pounds for the entire module with cable. I could probably remove and replace the battery pack in under 15 minutes, but not in an "on the road" situation. There is one large connector plug that runs from the battery module. To remove it requires removing a few frame pieces, but nothing tough. There are 13 wires coming from the battery module cable, suggesting there is circuitry in the battery module as well. Frankly, it should not be that hard to re-engineer the system such that an unpluggable-replacable battery module could easily be developed such that new, fresh batteries could be created. I have not decided if I am going to open the battery module. Doing so voids the warrantee. However, logic tells me there should be a simple way to supplement a second battery into the system, by inserting a battery in parallel with the current battery. I have photos, and will upload soon.
@Count Cool waiting eagerly to see that :D
DrN3RD last edited by
@Count Supra excited to see those pics bro!
If I know Im gonna ride for a long period of time Ill just bring the charger with me and let it charge at the nearest spot to plug
thegreck last edited by
@juts That plan only works if there IS a spot to plug it in. Having several portable recharges on you when you're camping in the desert or out on a mountain hiking trail would be key.
sonny123 last edited by
I've done it on my E-Go electric skateboard.
Could've added a second battery in parallel for double range,
instead I just rewired so I can unplug from main battery and plug into additional pack with higher AH.
There are way to do it on the OW.
@thegreck thats true. Usually where I ride my OW to does have a plug in so i just use it there.
I ride almost exclusively on the beach. No random outlets along the way, thus my desire to develop a backup battery system I made good progress last night. I completely extracted the battery. This thing is well built! My original idea of using the charging port definitely will not work as a connection point for a backup battery. The battery reads 54.4v fully charged. This is baffling, as FM does say it is 48v and charger says 58v. The actual battery pack is composed of 4 12.8v battery packs (16 cells total) in serial which are labeled as being Li Ion (not LiFePo4 as they advertise). Perhaps they are the same thing, I'm not certain, and am just reporting what I see from the inside. Battery pack has a 3rd party part #266504S12 which I googled and came up with nothing. Here is a photo of the battery pack and cable: ![0_1464573825841_100_1894.JPG](Uploading 100%)
apparently I don't know how to post photos. Any suggestions?
Until I figure out how to post photos, I am going to make a NiCad battery pack to try as a test plug in backup battery pack. It should cost me below $50, as opposed to buying a $400 LiFePo4 pack only to find my idea does not work. I plan to run a pair of battery cables from inside the battery compartment through a cable gland similar to the one used by FM for the other cables which exit the sealed battery compartment. There is a perfect place for it opposite the location where their cable gland is, where the existing cable exits the battery compartment. From there I will be able to disconnect the stock battery, using the same connector types as they use, and connect my battery pack. IF that works, then I will refine it to perhaps an A/B switch which can switch between the battery packs, and/or ultimately contemplate connecting them both in parallel, making no battery switch necessary. Along the way I will be interested in observing how the iphone app reacts with my new battery connected.
thegreck last edited by
The actual battery pack is composed of 4 12.8v battery packs ... labeled as being Li Ion (not LiFePo4 as they advertise). Perhaps they are the same thing, I'm not certain
They are absolutely not the same thing! There are a mulititude of reasons that make LiFePo4 batteries far superior to Lithium Ion batteries, and advertising them as such would be pretty bad. So if these are indeed NOT LiFePo4, you've stumbled upon something pretty big. Are you sure that's what it says?
Just the way they behave -- such as quick charging time, long life (in terms of how many times it can be charged before it starts to lose capacity), they stay cool while charging and discharging, they discharge at an equal rate all the way up until the end of each charge, etc -- make it difficult for me to believe that they're not the battery type Future Motion claims they are.
All I can tell you is what is on the sticker on the battery pack. The pack is 16- 2.5" green cells, shrink wrapped in a blue wrapping. On the pack is a sticker which reads:
Li Ion Battery
12.8V 6.9Ah 88.32Wh
Part No. 266504S12
Made in China
I will try to remove some of the blue shrink wrap to reveal what is actually written on the individual green cells.
The individual green cells are double wrapped in reinforced strapping tape, and then blue shrink wrap. I am not willing to dissect the pack further to identify the cells at this stage as I am afraid I may damage it. Perhaps FM monitors these posts and will be willing to respond???
To upload a photo, upload it to a pic hosting site like photobucket or imgur or imageshack.us and then get the link but use the html code [img]url for pic here[/*img] just dont use the * and that should work
Also if the battery isnt as advertised then this like Greck said is gonna be a huge huge deal.
I decided to try a YouTube video. It is my first one, so don't critique me! Turn the sound up some... link text
@count Am i the only one to be amazed that the battery is labelled 12.8v ? can you use a volt meter and check that?
@Tartopom The output of a fully charged battery reads 54.4v. The only thing I can think is that there are 4 battery modules, connected in series, within the battery pack. 12.8 x 4 = 51.2 volts, which falls between the advertised 48v and what I read, 54.4v. There are certainly some unanswered questions here!
@Count there is something wrong... because FM claims that the battery is around 116wh and I the sticker it is 83ish...