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18

If your light is not sealed, and you can see a battery that looks like this (the colour/color does not matter) then you can pop out all the old batteries and fit new ones. Replace all the batteries in one light together, don't mix and match. The old ones should be recycled properly. If the current batteries are soldered in, then its still possible to ...


15

First, hello, and welcome to Bicycles SE. Sorry to hear about your manufacturer collapsing... that's really unfortunate, particularly for a higher-cost item like an e-bike. My guess is that 18350950 mAh 3.7 Li-Ion is actually "18350 950 mAh 3.7 Li-Ion", meaning that the pack is comprised of 3.7 volt 950 mAh 18350-type lithium ion battery cells. ...


11

Hilariously, such a product does exist. It comes from notorious crapgadget vendor Thanko. Note that it only purports to charge two AA batteries, and it's not an efficient way to do that. They make no estimate of how long it would take to fully charge those batteries. I did some playing around with this calculator. Based on some guesses and estimates, it ...


9

You can charge it, but you probably won't do as well as you think. You're on the right track but you're missing a couple of things: Solar panel ratings: These are optimistic and assume full sun hitting the panel at a good angle. Here's the maths. You won't get that all day, so don't expect to get as much as you would by multiplying the number of hours ...


6

I am also searching for a computer with non-volatile memory. According to Sigma the computers BC 5.16 BC 7.16 BC 7.16 ATS BC 9.16 BC 9.16 ATS PURE 1 (according to the reply from Sigma customer service) do not save your values after a battery change (however, you can manually set the odometer). And following Sigma computers retain data: BC 14.16 BC 16.16 ...


5

An additional downside is electrical conversion losses. The solar panel will likely be putting out around 12V at some current, perhaps 5W for a 500 gram panel to 20W for a 2.5 kilogram panel. That's roughly 0.5A and 2A at 12V. Inverting that to 220V AC and then rectifying it back to DC 36V to charge the ebike battery will lose a significant percentage of ...


4

Ross's comment about a perpetual motion machine is bang-on. The second law of thermodynamics says that any transfer of energy from one form to another is wasteful. This is a machine that tries to take the wind generated by forward motion, convert it to rotational energy, convert that to electrical energy, convert that to chemical energy (in the battery) and ...


2

Good afternoon, Whilst I appreciate you prefer to use bicycle parts, you may find it beneficial to search for scooter or wheelbarrow hub motor/wheel. The benefits of which would be - they're water tight, they're simple (a nut to hold the axle at either side is all you need to secure it) and they have lots of tread. You can also run it using a motor ...


1

I'm going to assume that the question is: Where is the best place to put an extra battery that will: - Optimize weight distribution - Be out of the way / not interfere with general bike operation All three areas you have identified as options are used on touring bikes to store luggage and are reasonably interference free. The two options inside the front ...


1

My e-bike battery of 500 watt-hours lasts at 24 km/h around 120 kilometers. Thus, it lasts for 5 hours. This requires charging of 100 watts if I used solar panels to charge the batteries. I estimate that about half of the power is produced by the battery and the rest of the power (the second half) by me, the rider. So it's 200 watts total. Solar constant is ...


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