First of all I carry two 10ah batteries, so that’s only 50 miles each. Secondly I planned my trip distances based on terrain. I only planned to go 100 miles on days I was on level bike trails most of the day.

> How many amp hours is your LiFePO4 battery rated to hold? Did you get
your battery from Cycle 9, or another vendor?

I got my 10ah LiFePo4 battery from e-bikekit.com. It was one of the batteries Clever Cycles recommended to go with my Stokemonkey electric motor kit for Xtracycles. I was excited recently to see a 15ah battery offered by Cycle9 that did not weigh much more than my 10ah. (See http://www.cycle9.com/c9store/batteries-c-7/36v-15ah-lifepo4-batterycharger-p-148.) And with seasonal gift-giving only a few months away.

> What is the max amps your controller is rated for?

I’m not sure about the controller, but the battery is rated for 20 amps continuous current and 25 amps max. I think my controller may be limited by a setting of my Cycle Analyst ebike computer.

> And how much do you use the assist during the day? Some what
continously, or only on significant hills? How many amp hours do you run
through in the day?

When I’m in town on a short errand I basically hold the throttle down the whole time I’m on the bike. So a busy day will use 200wh over 10 miles. (I am used to thinking in watt-hours rather than amp-hours.) But on longer trips like this post describes when I’m in hilly country I only use the electric motor on hills and even then I limit myself to 400 watts of power. With that frugality I can go 50 miles per 10ah battery. I carry two batteries for a 100-mile range.

> Our experience has been that although the 10AH battery was rated for “15
to 30″ miles, our theoretical estimates found that our use could get us
60 to 90 miles on one charge, because we weren’t using it continuously.

This trip was unique in that a good portion of it was on rail or canal trails that were extremely flat. I had power to spare on such terrain, so I experimented to find the best way to use my watt-hours for speed: continuously holding down the throttle, going faster in bursts, etc. It felt like I got better efficiency at higher speeds (so for example 200 watts enabled me to go 20mph but 150 watts only enabled me to go 12mph). I’m not sure why higher speeds would be more efficient. It’s possible the momentum of my 120-pound bike helped overcome the friction of the rough trail surface at higher speed, or maybe the higher speeds gave me a psychological boost so that I pedaled harder.

I found it also helped to rub cayenne on my battery (inside joke ).

I’m interested in some of the technical details about getting 100 miles
one one charge.

How many amp hours is your LiFePO4 battery rated to hold? Did you get
your battery from Cycle 9, or another vendor?

What is the max amps your controller is rated for?

And how much do you use the assist during the day? Some what
continously, or only on significant hills? How many amp hours do you run
through in the day?

I have an E-Mundo with a 10AH LiFePo4 battery and a 35A controller. I am
considering upgrading to a 15AH battery.

Our experience has been that although the 10AH battery was rated for “15
to 30″ miles, our theoretical estimates found that our use could get us
60 to 90 miles on one charge, because we weren’t using it continuously.