Calling all math majors

[6zfshdb]

I came across this one that may be worth a look:

https://www.amazon.com/CoolschMax-Waterproof-Battery-Low-Voltage-Motorcycle/dp/B0DDXQ96BM/ref=sr_1_3_sspa?crid=2ZZCK9P87JVNY&dib=eyJ2IjoiMSJ9.gJP8MUkqx_fKzlXcoOWdgx55IV7kosQMDsrZ1nLVPMqRXJKh8iRN5290iicG9XsNruKMYSZAley2G15mLKxkxt5oS5DPV6EBHYoBGuQ02JIrXaCL1uZMSDdbHiy1ac31GSi-mQX6ORQ4o5Dz8Hj44SGk620m3qYcYywJ8U28dp2YAMbZI2sBHODHjEaVdeMnqEBPlGEeMNfGdH1TTtomBo8ErsXH39kVqUUAlWDdpnv11ZRmDVTG8tPvqlAD04TIhGcLA47SdT-1E029HOlDHUHeOZIfnuOapqVNkea_4yk.INpkVV0s6Ig9rsYzSy_pUGWh2w31XDynsfBHMBu-74g&dib_tag=se&keywords=golf%2Bcart%2Bbattery%2Bgauge%2B48v&qid=1740077385&sprefix=golf%2Bcart%2Bbattery%2Bgauge%2Caps%2C155&sr=8-3-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

It's digital but the LED's are positioned in an analog fashion. It's also custom adjustable from 9.5 to 100V

 

[kevinmccune]

you cant assume the battery will discharge in a linear fashion,such variables as chemistry,temp,the list goes you can get an approximate range and batteries change as they age.If you want to be safe get another spare larger ah battery and run the main battery to cut off,when it peters out change to the larger battery and return home"whistling away the dark"
There was an old saying about 4wd and 2wd in the outback,run in 2wd till you get stuck,then switch to 4 wd and return home.

 

[6zfshdb]

you cant assume the battery will discharge in a linear fashion,such variables as chemistry,temp,the list goes you can get an approximate range and batteries change as they age.If you want to be safe get another spare larger ah battery and run the main battery to cut off,when it peters out change to the larger battery and return home"whistling away the dark"
There was an old saying about 4wd and 2wd in the outback,run in 2wd till you get stuck,then switch to 4 wd and return home.

What you say is true and this is the way I usually ride.

I do however, like to monitor the SOC so I can switch batteries when the voltage drops into the acceptable storage range. That way, I only have to partially recharge one battery for storage instead of two.

 

[why?]

I can’t tell you because…………..the last thing I’m going to be concerned about are those perhaps slight variations. Fifteen miles per volt works for me!

Highly unlikely unless you're a featherweight with wind at your back, and highly efficient ebike with level urban paved paths (no inclines), even then you'd have to provide at least 50% power using pedal assist.

Whoever told you 15 miles per volt (with pedal assist) is trying his/her best to sell you an expensive ($2,000 and up) ebike. Then again if you only weigh 95 lbs. it might be possible with a wind at your back not exceeding 15mph and with you providing sufficient pedal assist power.

YES, i'm being conservative because ebike (battery) manufacturers overrate performance.

 

[PCeBiker]

you cant assume the battery will discharge in a linear fashion,
There was an old saying about 4wd and 2wd in the outback,

Just look at it like an old-school fuel gauge in your car.

It's not trying to tell how far you're gunna go, it's only telling you how much gas you got.

If you start going through a tank of gas in half the time or distance it could be any of these things,..

such variables as chemistry,temp,the list goes you can get an approximate range and batteries change as they age.

Or you forgot that you have your 13 ah gas tank plugged instead of the usual 25 ah gas tank and you forgot to fill it before you left the house.

 

[PCeBiker]

YES, i'm being conservative because ebike (battery) manufacturers overrate performance.

YES, and ebike riders like overrate their performance and give no credit to the machine.

This Lie Detector helps to expose the truth,..