What is the ideal range on a single charge?

What is an ideal range for an integrated battery on a single charge? (Assume dual battery option)


  • Total voters
    35

pushkar

Well-Known Member
Question is about the ideal range with single battery,fully charged.
  1. Assume that rider has enough power and a throttle.
  2. Assume there is a dual battery option to atleast double the onboard battery
  3. Ignore use case (commuting / fun / offroad) - just assume you are answering for your use case
 

pushkar

Well-Known Member
What's the impetus behind this poll?
Weight versus range tradeoff.
We are building batteries in the US now, and we have option of putting in 21700 cells in the downtube instead of 18650 (supply shortages). There is a capacity hit but there is a weight trade off too (lighter).
10-20% hit in range (from 50 miles / charge to 40 miles / charge) - but we knock off around 3 lbs weight.
 

onlineaddy

Well-Known Member
Region
USA
City
San Diego
Personally I think it makes sense to use the newer cell technology. Slightly lower range along with a lower weight is a good compromise I'm willing to make.
 

coldriderwi

Active Member
Personally I think it makes sense to use the newer cell technology. Slightly lower range along with a lower weight is a good compromise I'm willing to make.
I’d agree with this.

Are there any other benefits to the newer cell tech other than weight savings?
 

onlineaddy

Well-Known Member
Region
USA
City
San Diego
@pushkar I thought 21700 are higher energy density than 18650. So, shouldn't they be higher capacity (thus range) given the same weight?
 

onlineaddy

Well-Known Member
Region
USA
City
San Diego
I’d agree with this.

Are there any other benefits to the newer cell tech other than weight savings?
At the bottom of this page are listed four advantages:
  1. increased cell capacity
  2. increased energy density
  3. reduced system cost
  4. reduced system weight
Thus my above question to Pushkar: I'd think that we get both increased range and reduced weight using 21700 instead of 18650, meaning no compromise at all.
 

onlineaddy

Well-Known Member
Region
USA
City
San Diego
Yes, but the volume permits fewer 21700 cells- so higher density but lower # of cells (and hence weight saving).
Sure, but given the same battery size, wouldn't we still get greater range and lighter weight using 21700 cells (unless there's a lot of unused space inside the enclosure because the cells can't be packed as tightly)? Sounds like you're saying no.
 
Last edited:

Haystacks

Active Member
@pushkar Have you seen the CAD files on ES for the extended in frame battery? Gives the frame a belly but iirc its 21ah. Might be woth looking at, quite an elegant solution for watt monsters.
 

opimax

Well-Known Member
I need 100 miles per ride at decent speed on moderately flat trail I usually have 3 batteries per trip
 

AHicks

Well-Known Member
Region
USA
City
Snow Bird - Summer S.E. Michigan, Winter Gulf Coast North Central Fl.
I made the mistake of too big a battery on my first bike. It could easily go twice as far as my butt could, and was way heavier than necessary. That lesson learned, and knowing how far my butt can go at this point, 20-40 mile range is fine here - as long as that range is based on the reality it will actually make that range easily.