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this research seems promising. It may lead to much longer life for our e-bike batteries. quote: A novel single-ion conducting polymer electrolyte (SIPE) based on ionic liquid (IL)-decorated PMMA nanoparticles dispersed in a propylene carbonate (PC) host is reported. This SIPE possesses a...

The current row has been boiling under the surface since Russian intervention in Syria. NATO has to deal with a superpower that it cannot militarily humiliate nor defeat. Now it seems that Putin has won in Syria. This is just getting back at Russia in any way possible.

PF (NCA nickel cobalt aluminium) and 29E (NCO nickel cobalt) are similar in performance but do not have the same chemistry. I think PF is more stable but has slightly higher internal resistance. No. You need to use the speed limiter to stop the controller spiking thus protecting your battery.

you should compare her language against the kind of language you may hear when neighbours are engaged in disputes.

the measures TM has taken so far are measured.

it seems that our government feeds deliberately titbits to the media so that the right wing newspapers can speculate on them to create fake news. Not much in terms of concrete evidence has been made public. The source, chemical characteristics and delivery of the poison are still not determined.

war of words aside, there is a case for the UK government to act on probability.

the only thing you can do to prolong the life of your battery is to set the speed limiter to lower than it is at the moment. Speed is what kills the battery. When a cell is specified 2C, pull 1C top. That will keep the battery long life. Your 13S5P 48V 14.5AH battery with 29E is suitable for up...

legality aside, I would not recommend a geared hub for anything over 25mph. The Q128H has for example a gear reduction ratio of 13.2 to 1. When you hit 28mph on a 26" wheel, the RPM is 375RPM. Thus the rotor of the Q128H will spin at 13.2 * 375RPM = 4950 RPM. Your nylon gears won't last very...

the problem with direct drive motors is their very high noload speed because there is no built in reduction gearbox. A geared hub like a BPM code 13 has a noload speed of around 230 RPM, making the power consumption to max out at around 200-210RPM. That will pull around 15A from a 36V battery...

not just lost human lives. The recent wars in my life time (post WW2) displaced hundreds of millions innocent people after destroying the economy of dozens of countries. The general rule is simple. If a country is unlucky enough to discover some new natural resource, somebody would be interested...

politicians on both sides, UK and Russia, seem to want the same thing: increase the sense of insecurity in their population. Useful when you want to gain populist support and to spend more on defense rather than on the NHS.

I cannot see how Russia can disprove TM's accusation without having access to any evidence or the case being presented to an international institution. The case against Mr Putin was much, much stronger in the Litvinenko case. He met with Russia's envoy, traces of Polonium 210 were found etc.

the first step is to find out if anything rattles. If it does, then locate the source of the rattle. The next step is to measure the voltage at the balance wires. They are usually marked B0 to B13. B0 is ground, B1..B10 are used for 36V packs, B1..B13 for 48V packs. Measure the voltage between...

UK and Russia relations are damaged by this incident. Putin, TM and JC all lose something. Gavin Williamson is the clear winner.

I wouldn't describe it as weapon grade because of of the apparent lack of a military grade delivery system.

VX lethal dose is 10 milligrams, can act within 30 seconds and kill in 2 minutes through asphyxiation. Countries can keep samples, pharmaceutical companies and research labs are allowed to keep samples, total up to 22kgs before breaching the convention. That's enough to kill 2 million people...

while the BBC is busy with the Russian story, do you know that TM has agreed terms with the EU on the transition deal ahead of EU27 meeting tomorrow?

the reason I recommended the rear rack battery is because the controller box is well sealed and placed well away from surface water. That box protects the controller and connectors and usually is large enough to allow the controller to lose some heat - this is usually the fragile part of the...

you want a system that can be rained on all days of the week? start with a rack battery.