Recent content by DRL

I don't understand the disparagement lol. I run XP, Vista, Win7, Win8 AND a Linux box... they all have a purpose of some sort although I do regard my Linux platform more of a sandbox than the others, it is where I get my hobby fun. PS I have been messing with "systems" since the 60's.... when I...

lol Linux is to OS as DIY e-biking is to riding... a distant secondary consideration :-) It's all about the tinkering....

Final update- Chronicles of the Frugal Codger. I have the new pack - 4X12v 14ah (SP12-10-DZM) @ $45 each. All looks good. Float charge @ 54.1V I did about 10 short distance rides to condition. I upgraded my 6 year old no name chino goofy looking cargo bike (cost new $650) it is a 350W rear...

Put a mini wind turbine on the front and charge from that :-) do not go over the handle bars tho!!!

Likely so DS... However such treatments in the established (matured) electric motor/control manufacture is all but a de facto standard... it has been around for decades, almost not an option for any serious electromagnetic drive systems. In bulk or volume I would imagine the pc costs would...

In another work life I was involved with Heavy Component Rebuild of very large mining and locomotive traction motors. One aspect of electric motor service life after rewinding and so forth was a process known as VPI or Vacuum Pressure Impregnation of varnish to the devices, this was applied both...

BASF Begins Commercial Production of LFP Cathode Materials in Weimar, Germany Published on May 22, 2014 at 6:27 AM BASF today announces the launch of commercial production of LFP (lithium iron phosphate) cathode materials in Weimar, Germany. BASF is operating a 3,000 metric ton (MT) per year...

Wondering if this stuff is worth a look? NeverWet - hydrophobic coating Vid

I know, the plumbum is the bottom of the pit of despair :-). I got the bike 5 years ago after extensive surgery, chemo & rad treatments, I called it freedom 70 :-) I am somewhat N of retirement age but not ready to succumb to a rascal yet. Anyway I must say for my mobility need, recreation and...

Thanks everyone for the great info. It is much appreciated. The closest match I have found to my issue is this.... Although not chronic... I seem to be where the pack is operating at 50% for range and charging quickly as though the pack is 50% smaller than it is. Readings after charge are...

Ok, so with a close to spec charger doing about 56.9V @ 1.7A things appear well and good. Starting with a "fully discharged" condition (51V where the low voltage switch kicks in), the charger again completes the charge in only about an hour??? Way too fast. The charged voltage looks ok at 55.9...

Yes, I had them indoors and put the charger on them for a few hours every couple of weeks although the charger always popped up the green light and didn't go into charge mode. However since I found out yesterday it is producing 55V when "not running" that was probably maintaining them. Anyway, I...

This is probably an irrelevant update, but it may be useful to someone somewhere. The replacement sla charger was of unknown pedigree but at the time I needed one and it appeared to charge fine. It dutifully turned green when charge was done- I dutifully unplugged it right away. During the...

drkangel THANK YOU, this is extremely good information for someone like me who is trying to understand the battery/charging relationship. I had scoured the internet but found so much conflicting/confusing information I was at a loss... but now I am found :-) Excellent tutorial and rules of...

Thanks dogman. So after charger cutoff I am measuring 52.5 on the pack which after resting for 12 hours drops to 51.7 v so is it safe to say it is undercharged? or is this too little of a difference to account for the fast charge short range.? I don't know what the impact is on performance of...