There are all shapes and sizes of batteries that can be carried in a backpack, and companies that will produce a custom design. I'm not a fan, but batteries and quick-disconnect systems are available. Look at ebikesca, em3ev, Lunacycle and UPP, and others
Backpack battery?
I'm thinking of converting my DH bike but there is no place to mount a battery on the frame. I've seen guys build batteries to carry in a backpack with an umbilical cord to connect to the motor but does anyone make a battery suitable for this?
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I found this on ebay. Seems like it might be suitable?There are all shapes and sizes of batteries that can be carried in a backpack, and companies that will produce a custom design. I'm not a fan, but batteries and quick-disconnect systems are available. Look at ebikesca, em3ev, Lunacycle and UPP, and others
UPP 52V 20AH Ebike Battery Waterproof PVC Lithium Battery Pack for 1000W 750W | eBay
Find many great new & used options and get the best deals for UPP 52V 20AH Ebike Battery Waterproof PVC Lithium Battery Pack for 1000W 750W at the best online prices at eBay! Free shipping for many products!
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Excellent price, and the one battery that I purchased from UPP was good. You might put 13 - 14 pounds in a backpack and ride around for awhile before purchasing.
I've ridden with that much weight and more so no worries. It's my only option though as there is simply no place to put a battery on the frame.Excellent price, and the one battery that I purchased from UPP was good. You might put 13 - 14 pounds in a backpack and ride around for awhile before purchasing.
I can't think of a worse place to carry weight, and I still run water bottles on my frame because of it. I'd suggest either building some sort of rack above the rear wheel, hanging it below the downtube, above the top tube, hell even in a handlebar bag, anything but in a backpack. Even better of course would be to just buy a pre-engineered eMTB and quit wasting your time with the e-frankenbike. Maybe even do one of those carbon frames on ebay that come with the Bafang motor and battery, then swap over all the parts from your downhill bike. There's a good Youtube series about doing that by Rob Rides, or something like that. I was tempted to build one like that myself, but the black Friday deal I got last year on a complete bike was just too sweet....and Black Friday is coming around again you know.
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Just a warning coming from the rc side of things. RC car racing rules require hard-cased batteries to prevent puncture and the resulting fire.
There is no way in hell I'd carry a softpack battery in a backpack on my body.
There is no way in hell I'd carry a softpack battery in a backpack on my body.
Look at endless sphere; there have been threads that discussed backpacks. You might get ideas about quick-release connectors or whatever.
Hmm. I wonder if this would work as a range extender for my Turbo Levo. Way cheaper than a stock battery for sure and small and easier to fit in a pack. What are the dangers of carrying a battery like this on your body?I found this on ebay. Seems like it might be suitable?
Couldn't disagree more. It's always better to carry excess weight unsprung. I've been riding with hydration packs for years and on expedition rides I've had over 20lbs including a 3 liter bladder.I can't think of a worse place to carry weight, and I still run water bottles on my frame because of it. I'd suggest either building some sort of rack above the rear wheel, hanging it below the downtube, above the top tube, hell even in a handlebar bag, anything but in a backpack. Even better of course would be to just buy a pre-engineered eMTB and quit wasting your time with the e-frankenbike. Maybe even do one of those carbon frames on ebay that come with the Bafang motor and battery, then swap over all the parts from your downhill bike. There's a good Youtube series about doing that by Rob Rides, or something like that. I was tempted to build one like that myself, but the black Friday deal I got last year on a complete bike was just too sweet....and Black Friday is coming around again you know.
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You crash and puncture it and it catches fire. Enough of a risk that you won't find a single indoor RC track that will let you run soft-pack batteries.Hmm. I wonder if this would work as a range extender for my Turbo Levo. Way cheaper than a stock battery for sure and small and easier to fit in a pack. What are the dangers of carrying a battery like this on your body?
Just a few examples and these are in buggies with suspension, now imagine 140+ pounds landing on one with a nice rock under it.
Yeah, that doesn't look good. I'll just have to remember not to crash.You crash and puncture it and it catches fire. Enough of a risk that you won't find a single indoor RC track that will let you run soft-pack batteries.
Just a few examples and these are in buggies with suspension, now imagine 140+ pounds landing on one with a nice rock under it.
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FYI, "unsprung" would mean the weight was attached to the lower fork legs or rear triangle, and that's worst case scenario. Your body, the main frame, handlebars, seatpost, etc. is all "sprung weight" (supported by the suspension), which is where you want as much weight as possible. The higher the weight is mounted (including on your back) the worse it is for handling due to it's effect on center of gravity, not to mention the physical benefits of not carrying that weight with your body.Couldn't disagree more. It's always better to carry excess weight unsprung. I've been riding with hydration packs for years and on expedition rides I've had over 20lbs including a 3 liter bladder.
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🤫FYI, "unsprung" would mean the weight was attached to the lower fork legs or rear triangle, and that's worst case scenario. Your body, the main frame, handlebars, seatpost, etc. is all "sprung weight" (supported by the suspension), which is where you want as much weight as possible. The higher the weight is mounted (including on your back) the worse it is for handling due to it's effect on center of gravity, not to mention the physical benefits of not carrying that weight with your body.
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Haha right 5 or 6 inches of suspension vs. the ability to shift my entire two hundred pound body far more in all directions. Exactly the same lol. As someone who regularly rode with a 20lb hydration pack on long grueling back country expedition rides for years you'll have to pardon my complete disregard for your opinion. Having a battery in a backpack would be far less a hindrance to handling than affixed to a rack above the rear wheel, even if it didn't hit my ass when I was way back off the seat going down the steep stuff.FYI, "unsprung" would mean the weight was attached to the lower fork legs or rear triangle, and that's worst case scenario. Your body, the main frame, handlebars, seatpost, etc. is all "sprung weight" (supported by the suspension), which is where you want as much weight as possible. The higher the weight is mounted (including on your back) the worse it is for handling due to it's effect on center of gravity, not to mention the physical benefits of not carrying that weight with your body.
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Don't you love it when someone doesn't understand the concepts or terms they're using, but will go ahead and double down.Good luck with that.
Typical. I can't seem to avoid at least one of these types on any given thread.Don't you love it when someone doesn't understand the concepts or terms they're using, but will go ahead and double down.
Agreed. So please explain how carrying excess weight on your suspension is better than on the frame?Typical. I can't seem to avoid at least one of these types on any given thread.
Just a hint, your belief is pretty much the opposite of any silly experts in motorsports, so I would really love to have the revolutionary theory explained to this pea-brain.
Enlighten away.
Well pea brain the whole thrust of this thread was exploring the options of battery placement other than the frame. Because that was NOT an option. There is no place to put a battery on the bicycle. Period. I've seen riders in this case put battery packs in backpacks. My Turbo Levo has a battery in the downtube. My DH bike with it's complicated suspension and shock placement simply doesn't allow mounting a battery anywhere. I can fit a mid drive motor on it and carry the battery in a backpack and since I'm used to carrying a heavy hydration pack it seems like a workable solution for me. I suggest you step off the thread since you have nothing constructive to offer.Agreed. So please explain how carrying excess weight on your suspension is better than on the frame?
Just a hint, your belief is pretty much the opposite of any silly experts in motorsports, so I would really love to have the revolutionary theory explained to this pea-brain.
Enlighten away.
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