Search results

According to one study, storing batteries at 0c has a small effect on lithium ion batteries if only charged up to 40%. I know the lower the temps get -32C the greater the degradation but I’m not sure by how much.

I have come to learn that I have a smart balancing BMS so I can use the battery from 90%-10% with very little effect on capacity degradation. I don’t quite understand why the two batteries won’t benefit from using them with a Depth of Discharge of 50% (i.e. only charging them up to 75% and...

Thanks Ravi. I trust you. I know there is nothing better than just using the bike/battery and seeing how long it lasts for me. Thank you for indulging me. I usually start all of my major purchases (from TVs to cars to A/C units for my home, to computers and now to ebikes) with fact-finding...

Thanks Ravi, these studies seem to reference 4,000 life cycles with a 40% DoD used. Is there a reason you only go up to 1,500 cycles? Actually I found one of your slides. It shows a 4,500 life cycle when using a 60% DoD. This number is better. Is there a reason you believe a better DoD won’t...

Here is the link to the articles referencing the studies Ravi: https://batteryuniversity.com/index.php/learn/article/how_to_prolong_lithium_based_batteries

Ravi, depth of discharge seems to be the main factor that contributes to a significant loss of cycles (after temperature factors, of course). In this graph (see pic) it shows that I would get 1,000 cycles when using a Depth of Discharge of 80%-85% (which I believe means using a battery from...

I get 55 miles per 100% charge (always using the two highest settings) and I ride about 65 miles per week. One ride is usually around 40 miles and the second around 25 miles. I really only need a 2nd battery once a month when we go on 55+ mile rides. So the 2nd battery is really only necessary...

Hmmm, I found the graph below on capacity retention on Batteries that were used in 7 different scenarios (i.e. 100% down to 25%, 85%-25%, 75%-25%, etc). At least in this study, it showed that the light blue line (using a battery only 75-25%) would yield a sweet spot where a batteries capacity...

No, I am currently charging both up to 80% and using them down to 30% so I can double the life of each battery. I figure if I spend the extra $900 today I’ll get an extended capacity so in the end I’ll save $900 (from not having to buy a 3rd battery later). I can go about 57 miles on 100% charge...

Thanks Ravi, I did have another concern. The 2nd battery literally sits on top of the battery on the top tube below the Civante letters in the pic (It’s in a bag and I use straps to keep it secure on the bike frame but on bumpy roads the battery sitting on top of the installed battery on the...

I’m going on a ride on Friday. I’ll drain my battery down to 10% and see how long it takes for it to get to 75%. I’ll be in touch

Let me know if you need any help. Many hands make light work :)

Ebiker01, Yamaha says it takes 2 hours to charge form 75% to 100%. Does that mean that theoretically (using your math) the Yamaha battery should be able to be charged from 0% to 75% in 1.47 hours?

Ravi, I recently bought a Yamaha Civante ebike. I bought an extra battery ($900) so I can save money in the long-run. My thinking is “if I spend $900 today, I shouldn’t need to buy another battery in a long time because I’m using a 75-25% rule” (i know it’s 80-20 but at $900/battery, I’m being...

Have the Fall results been posted?

Oh wow, I didn’t know that. Thanks FlatSix

I was wondering how many times a year I should fill to 100% to balance the cells. I think I’ll do it 3x per year (just to be safe). Thanks Ebiker!

Mike, did you know you can use an indoor “dumb” trainer (Costco sells one for $70) with your ebike to use Zwift, Rouvy, Sufferfest, etc because you’re bike has speed/cadence sensors? For only $70 you can continue to use your ebike during this snowy season...

Oh wow, after 12,350 miles of 100% charge (left full overnight) and single digit discharge and STILL maintain 100% battery integrity is INCREDIBLE. I was wondering if I should discharge my battery to 10% to time how long it takes to charge to 70% but wasn’t sure if the integrity of my battery...

Mike, do you know why the Yamaha battery on my Civante ebike charges 0-75% in 2 hours when the Haibike takes 3.5 hours? If I was able to charge my battery 30-75% in one hour, does that mean it would take an hour to charge from 0-30%? If yes, does that mean batteries slow charge at the beginning...