On 18 Dec 2013 at 16:29, Michael Ross wrote: > After buying this pack, I am not sure if Ping are really worth the > rather large extra cost.
I don't have anything to compare them to, but mine are now almost 2 years old and still going strong. I would (will) buy from them again. My only gripe is the cost for shipping, but I have to say they were packaged VERY well. I built mine into custom aluminum boxes with little smoked-acrylic windows to show off the blinky LEDs on the BMSes. The capacity was a bit low at first, 9.something ah for a 10ah rated battery, but at last test last summer, it was around 10.5ah. That's to ~21 volts for a 24 nominal volt battery, when my 24v inverter shuts down. I try to charge until the first LED comes on, not really needing maximum capacity. I let them balance (all 8 LEDs) every 5 or 6 charges. Even at that, from 1 LED to 6-7 on is usually less than a minute. Often there one or two slight stragglers that continue to blink briefly for another few minutes after that, then it's (presumably) balanced. These are obviously too small for road EVs, but are fairly widely used in E- bikes and scooters. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
