Smartphone hub USB connector power

[retiredNH]

Anyone have any idea how much power can be drawn from the smartphone hub USB connector? I'd like to run two devices but don't want to (a) damage the hub or (b) waste money on some sort of y connector only to find it's useless.
Thanks

 

[BlackHand]

I believe William posted a table showing this info for all the displays at some point but I can't remember which thread it was in. I'll see if I can dig it up

 

[BlackHand]

Looks like 5v / 1 amp according to the manual - so might not be enough juice to power 2 devices. BTW this is one area the SPH outperforms most of the other displays. Most of them either have charging disabled on their usb port or are limited to 500mA.

 

[retiredNH]

Looks like 5v / 1 amp according to the manual - so might not be enough juice to power 2 devices. BTW this is one area the SPH outperforms most of the other displays. Most of them either have charging disabled on their usb port or are limited to 500mA.

Thank you for the info. Yes, it's remarkable in this day of connected devices that so few ebikes, not just Bosch, provide USB power, let alone power to more than one device. It would be trivial in terms of cost in a multi thousand dollar bike, and trivial in terms of load on a 500+ watt battery, yet you don't find it.
Of course the only reason the SPH offers power is because it uses an external display for full functionality, the only system I'm aware of that does so. So yes, it makes sense that they power such external display. The designers didn't do it to offer a convenience to us riders, did they?

 

[William - Bosch Team]

Intuvia is 5v / 500mA
Kiox is 5v / 1A
SPH is 5v / 1A

You are right @retiredNH , very few companies offer any major phone charging abilities. My understanding is that it relates to the effects on range, but I'm not familiar with all of the reasoning behind it.

 

[retiredNH]

Intuvia is 5v / 500mA
Kiox is 5v / 1A
SPH is 5v / 1A

You are right @retiredNH , very few companies offer any major phone charging abilities. My understanding is that it relates to the effects on range, but I'm not familiar with all of the reasoning behind it.

You've got to be really demanding to think about a range effect. Consider a 5V 1amp source. Ignoring conversion efficiency, which should be high for a decent dc to dc converter, you're looking at 5 watts per hour. That's one percent (!!!) of a typical 500 watt battery! And even less for the 625 watt battery that I have.
I think it's just that the product cycles for ebikes are really long, and the designers stuck in engineering mode. Given what I see on my ebike, a Trek, the designers didn't spend much time talking to actual users or potential buyers. It's a decent bike with many flaws, like most others.
Pretty sad that we're forced to put USB power bricks on our electric bikes to power our accessories!

 

[webcurl]

Anyone have any idea how much power can be drawn from the smartphone hub USB connector? I'd like to run two devices but don't want to (a) damage the hub or (b) waste money on some sort of y connector only to find it's useless.
Thanks

Shouldn't really damage the hub or anything else if you try.