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Spare Power tube 750w mounting on bike

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Tedster209

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Hey :)

Got a Cannondale mottera eq with 750w battery, at time purchased another battery as worried about range.
Bought a fire proof bag for spare battery but mounting didn’t work too well.
What’s a good way to transport around, some kind of padded trunk to take shocks out?
Worried anything less may lead to cracking ot bursting it
 
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Plummet said:
I would never take a spare 750 wh battery on a ride.
Organise your rides in loops so you can loop back to the car and swap batteries mid ride.
Turn you bike down to get extra range. Use more lungs and legs......
Click to expand...
Not all like to go around like in Disneyland

I for example prefer to do a 70km straight ride, and return by train/uber/car
 
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Plummet said:
70km can be achieved on a 750wh
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Yeah did 20miles there used about 50% on auto, but I’m 100 plus kg and hilly.
but yeah was thinking if wanted to do 60 may struggle on 1 battery. Will try next ride on tour+ see how get on.
Just wondered if people did or risk of damaging battery too high
 
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Tedster209 said:
Yeah did 20miles there used about 50% on auto, but I’m 100 plus kg and hilly.
but yeah was thinking if wanted to do 60 may struggle on 1 battery. Will try next ride on tour+ see how get on.
Just wondered if people did or risk of damaging battery too high
Click to expand...
Auto burns battery. Try tour + 70nm, 500w max. That might not be quite enough for your 100kg+ but worth a try.
 
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Similar weight challenges here. I don't ride with a spare battery, they're just too heavy to drag along with me & my other stuff.

I tend to be in the 30-40 miles kind of range when it's hilly (although generally an uphill will eventually give way to a downhill for a bit). I reckon 60 miles is achievable if you don't mind a bit of leg work. Tour, or Tour+ are where I'd start and put more leg work into it at the start with fresher legs. Then if you know the profile, you can relax as the ride progresses and boost the assist if that's what you want to do.

Only once have I dipped into the settings in Flow. That day, I was up in the wilds and the long uphill through grassy fields & rocky tracks sapped loads of power in Turbo mode. I dropped into Eco but decided it was a bit grim so upped the assist & the amount of power it offered. I figure I'd rather do a shorter ride but enjoy it than worry about range anxiety - although that only really works if your loop can be adapted.
 
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mcmcmc said:
Similar weight challenges here. I don't ride with a spare battery, they're just too heavy to drag along with me & my other stuff.

I tend to be in the 30-40 miles kind of range when it's hilly (although generally an uphill will eventually give way to a downhill for a bit). I reckon 60 miles is achievable if you don't mind a bit of leg work. Tour, or Tour+ are where I'd start and put more leg work into it at the start with fresher legs. Then if you know the profile, you can relax as the ride progresses and boost the assist if that's what you want to do.

Only once have I dipped into the settings in Flow. That day, I was up in the wilds and the long uphill through grassy fields & rocky tracks sapped loads of power in Turbo mode. I dropped into Eco but decided it was a bit grim so upped the assist & the amount of power it offered. I figure I'd rather do a shorter ride but enjoy it than worry about range anxiety - although that only really works if your loop can be adapted.
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Nice yeah think need to take look at settings as auto was comfortable but maybe too comfortable :)

Was googling routes though and found out to encourage e-bikes they are putting fast chargers at stops, which is pretty cool.

Looking around Callander/aberfoyle/loch lomand way crazy hills but great landscapes

Aberfoyle more rocky/gravelly Callander routes look more grassy muddy
 
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Tedster209 said:
Nice yeah think need to take look at settings as auto was comfortable but maybe too comfortable :)

Was googling routes though and found out to encourage e-bikes they are putting fast chargers at stops, which is pretty cool.

Looking around Callander/aberfoyle/loch lomand way crazy hills but great landscapes

Aberfoyle more rocky/gravelly Callander routes look more grassy muddy
Click to expand...
I know how you feel about the modes. Sometimes I make a point not to use Turbo or eMTB too early on as it makes me miss it when I dial it back.

It's a nice part of the world up there. I drove through Callender on the way to Skye for a (bikeless) holiday earlier this year.

Thanks for the heads up on bike charging en route, I didn't know they were a thing. Nothing in my usual stomping grounds of Northumberland & down in Essex (which is waaay too flat), but some interesting options for a longer ride in places I've thought about checking out.
 
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Tedster209 said:
Hey :)

Got a Cannondale mottera eq with 750w battery, at time purchased another battery as worried about range.
Bought a fire proof bag for spare battery but mounting didn’t work too well.
What’s a good way to transport around, some kind of padded trunk to take shocks out?
Worried anything less may lead to cracking ot bursting it
Click to expand...
Either buy an Evoc E-Ride backpack (they have a battery compartment and the essential built in back protector) or plan adventure routes in a figure of eight, saves doing boring loops over ground you've already covered.
I have an Evoc -E ride and you honestly don't really feel the battery weight as the shoulder straps and waist straps are nice and wide and spread the weight of the battery. But usually it's still better to plan a ride in a rough figure of eight, the route doesn't even have to cross at the exactly your vehicle, your on an emtb so an extra mile or so is sod all, especially if your swapping out your battery.
 
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Mario Antony said:
Depends on climbs, and modes used.
As soon as the ride starts to add meters of altitude, battery just sink like a stone.
Click to expand...
Certainly you trade distance for vert meters that's for sure. Op seems more of a rail trail cruise long distances on easy terrain kind of guy rather than some one punching real punchy mtd steep. If he was hitting anything remotely difficult he wouldn't be entertaining carrying a spare 750wh battery. That is utter madness for full blown mtb riding.

He should of course consider the biggest extender battery he can fit on the bike. Another 200wh will give him another hour in the saddle.

At 80kg kitted this is my most econimical e ride. I had 28% left on a 600wh battery.
Extrapolate that out into distance and vert at 100% battery usage we are sitting roughly 67km and 1823mtr vert.
That is the top of what i can achieve milking the battery for what its worth.


1775417776475.webp
 
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My normal ride is like this, and on that day consumed 97% of 750Wh.

Screenshot_20260405_230608_Strava.webp

And on this day, a more "flatish" ride, only consumed 80%.
What real depleats ebike batteries, is really the ascension!
As soon as you start climbing, you almost can ear the electrons flowing....
Screenshot_20260405_231123_Strava.webp
 
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Plummet said:
Certainly you trade distance for vert meters that's for sure. Op seems more of a rail trail cruise long distances on easy terrain kind of guy rather than some one punching real punchy mtd steep. If he was hitting anything remotely difficult he wouldn't be entertaining carrying a spare 750wh battery. That is utter madness for full blown mtb riding.

He should of course consider the biggest extender battery he can fit on the bike. Another 200wh will give him another hour in the saddle.

At 80kg kitted this is my most econimical e ride. I had 28% left on a 600wh battery.
Extrapolate that out into distance and vert at 100% battery usage we are sitting roughly 67km and 1823mtr vert.
That is the top of what i can achieve milking the battery for what its worth.


View attachment 181024
Click to expand...
Yeah last ride did there was 20miles gravel, not at all technical but bumpy as f, glad had dual sus, very fast did 30mph down a rocky hill and think would’ve been nervous had a battery been on rack.

Gonna experiment a little with settings and maybe plan around recharge stations if doing longer rides and keep spare battery in car for now.

I’m on moterra eq 2023, so no extender
 
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Tedster209 said:
Yeah last ride did there was 20miles gravel, not at all technical but bumpy as f, glad had dual sus, very fast did 30mph down a rocky hill and think would’ve been nervous had a battery been on rack.

Gonna experiment a little with settings and maybe plan around recharge stations if doing longer rides and keep spare battery in car for now.

I’m on moterra eq 2023, so no extender
Click to expand...
Currently bosch chargers a slow charge. So until they release a fast charger charging mid ride will only give you minimal extra juice. If I was you I'd look at upgrading to a bike with 800wh battery ability to add a 200wh extender. Have that capability with and hope the fast charger comes out sooner and yourl be sorted.
 
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Plummet said:
Currently bosch chargers a slow charge. So until they release a fast charger charging mid ride will only give you minimal extra juice. If I was you I'd look at upgrading to a bike with 800wh battery ability to add a 200wh extender. Have that capability with and hope the fast charger comes out sooner and yourl be sorted.
Click to expand...
I also wish for a fast charge.
Sometimes I go for long rides (+70km), and normally I stop at restaurants where they normally help me in keeping the bike secured and even charge it (if I had the charger) - usually very nice people!

But @4A, even if it could be charged at 100% efficiency, 1h would equate to only 144Wh (<20% - 750Wh battery).

I hope I'm wrong here, but I don't think Bosch will push high current chargers with current smart batteries. Next probable/logical evolution, should be 48V systems, and even if they go thar route, I'm not sure if Bosch will have fast charging (@12A/or more).
Let's hope, I'm wrong!

The BIG issue of carry other battery, is really the dead weight on your back!
Even if you start with a 500/625Wh (750Wh on your back pack), and you're still fresh, you'll carry home a +3kg back home at the end of the ride. It doesn't sound much, but it's HUGE weight at a very high location from CoG.

Beside that, on some bikes, the battery plugs to the ebike near the headtube, and shorter batteries will have spacers near the motor (to make batteries the same lenght has 750Wh).
Having this spacers near the motor, will translate in having the CoG (~½ the lenght) of smaller, lighter batteries up in the downtube, which will have a significant effect on how you feel the battery weight difference.
In such bikes the difference will be almost not noticeable, when you're manuallying or lifting the front end.
And to take full advantage of lower weight and lenght, means inverting the spacer position and assemble a new plug on the spacer [some users that adapted 400Wh batteries on their RIGs, have that well documented].

Either way, carrying an extra battery on the backpack is not that fun, and probably is better to position the 2nd battery at a cafe/restaurant and swap once reached, or position the car in such a way that mid ride, you swap the battery...
 
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I've often been tempted by a second battery for huge days in Cheviot hills .I'd looked at a bike bag on top tub which would work fine for xc cycle touring .
A more secure option I was looking at a rear each with spare battery over the rear wheel with the weight being taken by the rack .
The weight over the back wheel rather than the middle of the bike will effect handling but for milder trails I'm sure it would work
 
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Mario Antony said:
I also wish for a fast charge.
Sometimes I go for long rides (+70km), and normally I stop at restaurants where they normally help me in keeping the bike secured and even charge it (if I had the charger) - usually very nice people!

But @4A, even if it could be charged at 100% efficiency, 1h would equate to only 144Wh (<20% - 750Wh battery).

I hope I'm wrong here, but I don't think Bosch will push high current chargers with current smart batteries. Next probable/logical evolution, should be 48V systems, and even if they go thar route, I'm not sure if Bosch will have fast charging (@12A/or more).
Let's hope, I'm wrong!

The BIG issue of carry other battery, is really the dead weight on your back!
Even if you start with a 500/625Wh (750Wh on your back pack), and you're still fresh, you'll carry home a +3kg back home at the end of the ride. It doesn't sound much, but it's HUGE weight at a very high location from CoG.

Beside that, on some bikes, the battery plugs to the ebike near the headtube, and shorter batteries will have spacers near the motor (to make batteries the same lenght has 750Wh).
Having this spacers near the motor, will translate in having the CoG (~½ the lenght) of smaller, lighter batteries up in the downtube, which will have a significant effect on how you feel the battery weight difference.
In such bikes the difference will be almost not noticeable, when you're manuallying or lifting the front end.
And to take full advantage of lower weight and lenght, means inverting the spacer position and assemble a new plug on the spacer [some users that adapted 400Wh batteries on their RIGs, have that well documented].

Either way, carrying an extra battery on the backpack is not that fun, and probably is better to position the 2nd battery at a cafe/restaurant and swap once reached, or position the car in such a way that mid ride, you swap the battery...
Click to expand...
I have the 400wh swappable batteru option low down you describe and is awesome. I also have a 600wh giving me 1000wh of capacity assuming I can swap m8d ride. It is awesome to do a 2 battery day.

I will never, ever carry a spare battery in a backpack and risk severing my spine in a crash... never.
The only way I would consider a second full size battery in a touring situation would be clamped onto some pannieers.

The idea of leaving a battery mid ride somewhere in route is an interesting one. That does involve a lot of admin, but if op is taking a train home, or too the start, I see it as possible solution.
 
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