Fantastic...maybe one of the best posts I've seen. There are some maybe even many who recharge their bike to 100% after their ride & just leave it until the next ride whenever that is.
I've been reliably informed it works, you need to plug in in, turn the bike on, then power the charger.
Decent advice in the main, but as I posted a few days ago I have discussed "deep discharge" damage with both Bosch and Shimano representatives; they both stated the BMS cutoff is very conservative, so discharging to an indicated "0%" is perfectly safe and will not damage the pack. It's also important to say that whilst charging and using from (say) 80% is a good idea if you don't need the absolute max range for a ride, you should charge to full every so often to ensure the cells stay in balance (balancing only occurs in the final 10-20% of the charge time where SOC is above 90%).
I think Mission Control diagnostics is possibly more likely. Possibly both with the new generation battery packs.
Discharging to an indicated "0" won't "damage" the pack as in make it stop working, but it will still reduce its lifespan compared to discharging to 20%. It comes down to if you want 300-500 cycles lifespan or something higher.
Sorry, but I don't think you understood my point. What Bosch and Shimano told me was that at an indicated "0%" the pack still had ~15-20% capacity unused, equivalent to leaving it at around 3.3V/cell. That should have no negative effects as long as you don't leave the pack in that state for months on end and allow it to self discharge below the point damage occurs.
This is true, But the only way to effectively do this is to add twice as much amp hour to the pack than you need. then just use it between90% and 50% but in reality nobody is likely to do that. Shelf life will probably kills many riders packs first if they only ride once a week. Internal resistance usually kills high drain cells before anything else, this is when you experience big voltage drops... Ask anyone into the RC scene. Thankfully our bikes do not use high drain cells because they are restricted by motor size that do not pull many amps.
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Way too much overthinking about batteries.
They will loose capacity over time. You may be able to slow it down slightly but it’s still going to happen, and even random stuff will happen to them that will stop them from working all together.
My 504wh battery is going along ok. It has lost a bit over its 143 charge cycles and 7153km. It’s sitting at 90% health which is 456wh.
I charge it always to 100% straight after or within 24hrs of a ride. It can sit up to 3 days at 100% sometimes and have even left it just over a week a few times. I run it down to around 30- 40 % most rides and regularly have had it below 5%.
I could of faffed around and treated it special. But at the end of the day, can anyone tell us how much more capacity I would of gained ? Probs not, but I can guess it would be less than 2%. The battery is going to be replaced after I’ve done 15000km, 300 charge cycles or capacity falls below 75% anyway. It’s a consumable ?
Given the mode of failure (total and overnight) we can safely say it is nothing to do with your charging and storage routine - degradation due to that is much slower and more gradual. Enjoy your new pack, but treat it a bit kinder in your storage and charging routine and you should get an extra 100-150 cycles out of it.Very interesting read. So since i got my Kenevo last year, i've always charged it to 100%, having read the user manual which did'nt say other than "always charge to at least 3/4 full (7 led's)".
So last week complete loss of power to the battery. Been into the LBS and they tested it - totally dead. Awaiting a replacement from Specialized and despite being told it would be here today, will be "another few days". I'll ride the fatty at the weekend then
So has charging it to 100% every time damaged the battery? If charging to 100% is not a good idea, should'nt the user guide say that?
I typically run it down to 40-50% on a ride, mainly in trail mode
Yeah, and your dick stops working how it should too apparently. ?
That’s probably why the manual says charge to 100% and leave it overnight...expedience or KISS. That’s actually not a terrible strategy if there’s an upper unused buffer so that the pack is never actually fully charged to 100%.
I just charged to 100% - BLEvo Battery Monitor states 41.8V so 10 cells in series = 4.18V so not much of a fixed top end buffer if at all. More likely the BMS limiting it with degradation & age.
I think that is the most likely reality although Giant seem to be able to produce a charger with more than just On/Off modes.
