Hell yeah! took that ride after doing a 12 mile hike as well. Legs felt wrekt by the end
I know the feeling. 3 separate rides and I would end every ride at 3.83 v a cell like magic every time.
I just didnāt know how it would work with lifepo4 cause like you said they stay quite consistent around 3.3v for a majority of their capacity, and then quickly drop off. How does a voltage checker like yours tell the difference between 3.3v per cell with 80% battery, and 3.3v at 30%? Seems like you wouldnāt get a true readingā¦?
Or is that specifically a calibrated lifepo4 capacity meter (if such a thing exists)
Is it just me or does lipo always seem to get better ranges for their mAh ratings?
Somehow you can achieve 15 miles on 5 Ah with lipos, but my battery made of lifepo4 cells is going to do about 10 miles, but with 7.5 Ahā¦
He may also not be charging the pack fully to 3.6 a cell. That would make sence cause then his pack would ride like a charged 12s pack the whole ride
But idk, thatās my guess
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Depends a ton on riding style, terrain, board, etc. What was your setup?
I think in my last range test I got 30km off my 12s 8ah LiPoā¦ Had some left in the tank too.
It is such a meter, but as you noted, the percent indicator is never correct unless it says 0% or 100%. I look at the voltage itself (39.7V for example) and combine that with my knowledge of how far I feel like Iāve gone, and it gives you a pretty good idea of how far you have left. It sits at around 39.5V (3.29V/cell) for an eternity but once it starts to budge you know you have about 40% range left.
Good to know, thanks B!
It will be a 14s3p lifepo4 pack, 7ah capacity. Iāll bet based off of peopleās experience along with calculator predictions that it will get me around 9-10 miles (have not fully built it yet, and am still waiting on power supply)
On the other hand, lipo setups running 5 Ah seem to get better ranges which is confusing to me. Maybe lipo builders just like to be more gentile while riding idk
Thank you for this data point. I suspected this is what could be had but wasnāt sure. What kind of average speed? Are you a glider / free roller or do you hammer and stop and lot?
possible correlation between experience level in riders and the types of packs they use.
It depends how I ride. If Iām cruising with my sister and sheās on a bike then I usually can get up to 40-50 miles (Davega Est. Range) since itās a very slow ride (usually under 12mph)
If I am riding at my normal pace on a 12s4p 30Q then I usually get 20 miles give or take with a stop and go hard acceleration 25 mph avg with bursts to 35ās. This is single drive 6374 with TB110ās and 16/40 gearing.
Could it also have to do with LiPos often times being overspecced for the kind of Amp draw we are using them for? For example a 5Ah 50C LiPo is rated for 250A, and so if you are only ever drawing 40A from it, thats only 16% of its rated current draw. So it may perform better than a Liion that is rated for 40A that is at 100% of its rated current draw.
Just an idea, I dont have much to back it up.
Theyāre also often inexpensive and have a shorter cycle life, but come with connectors on them and can be used with balance chargers conveniently. They make sense for beginning builders.
I was more addressing his first question about LiPos appearing to get better range for the same capacity. Not sure why I included you in the quoted section lol sorry
possible correlation between experience level in riders and the types of packs they use
This
On my MTB I had a range of 18-23km with 12s 8Ah 2 years ago.
Today I have 12s 18Ah and my range is about 25km, if I ride relaxed 30km, and like a girl 35km.
The difference, 2 years ago 50-60 motor amps and afraid of full throttle, today 100 motor amps and loving full throttle.
The range depends on the experience and riding style.
That did cross my mind regarding there ācā rating for their peak/constant discharge rates the brands like to brag about.
But then I thought, it couldnāt account for a 50% increase in Ah range. (5Ah lipo acts like 7.5+ Ah li-ion)
Who knows. To many factors, variables, maths and bs
My thinking is that most cells are only rated on their datasheet for the listed capacity at a certain (very low) discharge rate. So a cell like a LiPo that can handle high discharge better would be more likely to get closer to its rated capacity.
I was more addressing his first question about LiPos appearing to get better range for the same capacity.
right. I was thinking it may be because beginning builders arenāt riding as hard.