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Lithium batteries are improving all the time but they should be binned after 7 years, much less if they are left unused for long period, a year or more. It's really a case of use it or lose it. When they are left unused, dendrites form on the surface of the electrodes causing short circuit when...

original estimate was 3.4% fatality rate * (80% * 65 millions) population (52 million people) catching it = 1.77 million deaths. Since, they revised that down to 500,000 without social distancing, then 250,000 now with social distancing. That's 3 years worth of EU immigration!

One way to find out is to follow up the amount of antibodies in those that have recovered after being treated in hospital. If antibodies remain a long time in their blood after remission then it's a yes.

not really, I sell directly - so will always have an advantage on price. My main concern is we appeal to the older customers where they need the throttle. The Bafang MaxDrive does not have a throttle. The main cost difference between the various motors is this: $85 between a hub motor and a CD...

agreed. The wheels are standard, you can get a new set wheels with Mavic rims and DT Swiss spokes for about £125. I serviced some time 7 years old crank drive bikes. my crank drive bikes have throttle, that's the difference. They are more suitable for older people when climbing hills, they...

it's approximately the same. When a spoke breaks on a CD bike, it's bad luck, when it happens on a hub motor, it's design issue.

By the way, I forgot to add the air freight charge to the total. The main problem I have with the Chinese sellers is that they don't charge VAT. They leave to the customer the entire burden of declaring, paying VAT and assuming product liability.

often the case but not quite. The main issue with hub bikes vs crank driven bikes is the gyroscopic effect. When you pedal, the body tends to anticipate the movement of the bike the way of a normal bike would, that is, having very little inertia. When you pedal an e-bike, you feel the weight of...

both his bikes were made by Raleigh and the second bike (Raleigh Motus) costs more than the first bike (Raleigh Array). Warwick spent more on the next bike compared to the previous one. He started with a budget of just £300. The common factor in both case is the increase in their budget.

very interesting, easy to follow. Check the capacity tab, cases versus hospital beds - it's frightened me, even after government intervention.

I designed the block adapter sometime ago, based on this one: I am redoing it at the moment to reduce the 3D printing cost, having a bit of time on my hand this week. Here are the details of the frog battery: https://wooshbikes.co.uk/?batteries#smallfrog The steel metal clip is replaced...

I think it would be prudent to cancel a couple of those meetings until the government manages to reduce the rate of new infections. We are still in the phase of exponential cumulative growth until social distancing curbs its rate substantially.

I suppose you could connect an oxygen supply source to a cheap CPAP machine (the sort that is used to treat apnea) to make up a cheap respirator.

the kit that is comparable on that page is their 48V 500W TSDZ2 with 48V 12AH HL battery, priced at $476.80 If you want branded cells, you have to pay surcharge for Panasonic, Samsung or LG cells. Let's say $25. then you have to pay their Paypal surcharge because paypal charge then about 4%...

I'd like to see more blood tests for presence of antibodies - something to prove that you've been infected and become immune to the virus.

they all have two freewheels/clutches inside a crank drive motors, on on the main gear, the other between the motor and the main gear. You can put the bike on a stand and see for yourself how easy it is to turn the cranks without turning on the motor. When the battery goes flat, the withdrawal...

The vast majority (more than 90%) would never see a broken spoke. Among those who bought replacement spokes, you'd need to ride about 2,000 miles on average before you break a spoke on a rear motor wheel. Twice that on a front motor wheel. That could take some time. One simple way to protect...

don't know. anti HIV and chloroquine are both antivirals, but their actions on the virus are different. Therefore, some combinations seem to work in synergy. You need drugs that reach the lungs quickly and inhibit the fusion of the virus with human cells. The effect on the stock market worldwide...

Some Chinese patients in Hubei were interviewed on BBC1 last month. They were given anti HIV pills and it worked for them. remdesivir?

nevertheless, it's a low spec bike that you hired. Decathlon sells it for £799. Their better bike is the ST-900 series, they sell it for £1599. It will match the Bosch Gen3. https://www.decathlon.co.uk/e-st-900-electric-mountain-bike-grey-275-id_8487240.html