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Normally the slots are wide enough to suit most downtubes but if your water bottle is located very close to the bottom bracket, you'll need to add a rivnut above the top water bottle boss. The kit comes with extra rivnuts for this. In this case, the supplied rivnuts are aluminium and the frame...

yes, your battery received a lot less charge than sangeale and me expected, it's because you charged it at 0.4C and interrupted the charging before the constant voltage stage, Saneagle and me use much larger capacity battery, charge the battery at 0.1C and waited for the charger to complete the...

I like Sturmey chicken analogy. And the conclusion of this thread is? You should wait until the LED turns green before switching off your charger. Your battery needs time to spread the charge inside its electrodes. You can undercharge your battery up to 20% if you use a fast charger and unplug...

Controller is in the base.

There are adapter rails for the battery. Just ask Andy for the link. No drilling needed. Just noticed that cadence has already given you the link to the adapter rail.

he discharged the battery using the same load resistor. 135 minutes from initial 42V to 30V but 106 minutes from 41V, so 29 minutes difference or 21.5% capacity. What he demonstrated is the problem with fast charging. If you stop before the constant voltage charging stage, you can't charge at...

I think it's possible but what Stuart found if repeateable may be attributable to the small capacity 5ah of his pack. You don't see it on your pack because there is very little passivation on a large pack. Passivation is non linear and increases rapidly with changing current.

I understand your point. I understand your explanantion. The reason for that is fast charging creates a film of passivation on the surface of the electrodes causing the resistance to charging to go up, therefore the real capacity is less than what the apparent charging voltage would suggest...

you may need to do that just once, after a long period of storage. That will bring your battery to a known state (100% charged).

that's not necessary, especially if you have a recent battery and charger.

you have already got it with your charger. There is not much justification not to use it in the recommended way. Years ago, BMSes and chargers were not very good so people had to look for ways to improve the process but those precautions and workarounds are no longer necessary. Things like...

that depends on the BMS in your battery. Passive balancers use bleed resistors and start balancing when your battery is mostly full. Modern BMSes have active balancers that use a series of switches to shunt the charge from the cells with most charge to more depleted cells when the battery is not...

The test motor is not yet a finished product. Go to the last 5 minutes, his motor went into safe mode. His CYC motor did not inspire confidence either. It's only a bearing but it should not become notchy so quickly.

can someone figure out why Stuartsproject got only 106 minutes in discharging time when charging to 41V while he got 135 minutes on the same rig when charging to 42V? I can't think of any reason. His data: Rest volts 41.7. 41V, 0.01Ahr,0min 40V, 0.384A,10min On the face of it, between 41V and...

No. I always charge my battery until the LED on the charger goes green for about 5 to 10 minutes. If I check the voltage of the battery after disconnecting the charger, I usually read 41.3V to 41.5V.

Not many since I use Samsung and Panasonic cells. I reckon we retire less than 1 battery per thousand per year.

I am asking about your own batteries or those that you have fixed. This is because BMSes have active balancers that work continually in the background.

Saneagle test is very well done. He found that between 42V and 41V (for a 36V battery) you'd lose 3.1%. It's believable because the slope Voltage/Capacity is highest between 41V and 42V and also below 35V so the loss is between 0% (if the slope is infinite) and 10% (if the slope is the same for...

My Sans chargers output is 42V when the LED on it turns green but the battery voltage is between 41.3V and 41.5V. Saneagle uses How do you charge your battery to 41V? Do you use an adjustable PSU? Saneagle discharged his pack a lot more slowly to avoid voltage sag interfering with capacity...

Do they ask their component suppliers to follow the same doctrine?