Search results

there are lots of reasons why a low step bike is the right choice, independent of your gender: 1. You have a child seat on top of the luggage rack 2. You suffer chronic back pain 3. You like the Dutch riding style and their swept back handlebars

They are just generic. I have not seen a single battery needing rebalancing for a few years now so my experience with this issue may well be not up to date.

I will remind you, but remember, I am interested to know what the charger consumes when the voltage at the output is above 41V. My SANS charger does not let me do that above 41.3V

usually 41V but you'll know if you watch the energy meter, balancing consumes about 3W-5W on the meter. Now and then, it may spike to 10W-25W for a few seconds, the LED on the charger will flash red. If your battery is already balanced, the LED on the charger will simply goes from red to green...

Stuart's battery is practically brand new. I doubt that the bleed accounts for much in his experiment. Next time you charge your battery, check the power consumption when output voltage is between 41V and 42V and let us know what you see.

The SANS charger we use gives only up to 41.5V at the output port. If you ask have I seen 42V at the output on a 36V battery then the answer is no. I have of course tested batteries many times in the past.

just a brain fade moment. I see the numbers but somehow the brain registers something slightly different. In this case, I saw 4.1V and my brain does not go 10S=41V but 41.1V. Usually, a colleague will touch my shoulder and point at my mistake. The alarming thing is brain fade happens to me more...

Discharge curve: SAMSUNG INR271700-50E, stuartsproject's battery. Note: As you can see, if you pull hard on a full battery, the voltage will sag, you can't measure anything meaningful right away. However the top plot (@ 0.2A discharge current) is pretty good as representative. On the vertical...

I was mistaken, I thought you went from 41.1V to 41.2V. When I realised my mistake, I deleted that post. 41V to 42V is about 10%. Your 34 minutes are ball park figure.

Did you measure the 1.12Ah with an energy meter? If you did, you will have to deduct the conversion loss in your charger, the final amount will be about 0.9Ah or 9% of the capacity of your 10Ah battery.

that is correct but it's because it's more difficult to push the same amount of Lithium into an electrode that is already 90%-95% full. Its internal resistance to charging goes up when it is getting full. If you watch the amount of energy usage of a typical 36V 2A charger, you will see that it...

it can be up to 10% but I agree, the discharge curve is much steeper between 4.2V and 4.1V than between 4.1V and 3.5V where it's pretty linear.

I am intrigued by the 24%. I'll try to make a time lapse video about charging time / battery voltage/energy consumption over the weekend.

can you give me the URL of the cell loss table in post #19? Samsung 21700 50E discharge curve showing less than 10% difference in capacity between 4.1V and 4.2V Source: https://lygte-info.dk/review/batteries2012/Samsung%20INR21700-50E%205000mAh%20(Cyan)%20UK.html

When one of the pistons seezes up, I suggest you change the caliper. The Tektro I use is E350. You don't have to use the same model of caliper. If you need help, contact support@wooshbikes.co.uk

Your battery gives out what your charger pushed in. There can't be 24% difference in energy between 4.1V and 4.2V.

That doesn't seem right.

They float over a 'dome' and will eventually line up with the pistons inside the caliper. The main thing is you should watch how the pistons move when you squeeze the lever. You want to be sure that the two sides push equally when you squeeze the lever.

My Brompton has a front hub motor. I never feel like it loses traction. Rear hubs have better traction but that's not equal to front hubs lose traction.

thousands of bikes with front hub motors are sold in the UK every year. They may lose traction on gravel but even CD bikes and bikes with rear hub lose traction there too. On normal roads, they behave like normal e-bikes. Just let the OP try and ask him later.