APC Back-UPS Pro 500 Lithium Ion Review Discussion
Posted 26 June 2013 - 03:43 PM
APC Back-UPS Pro 500 Lithium Ion Review
Posted 26 June 2013 - 08:50 PM
Also some o-scope pr0n of the output waveform would be nice.
Posted 27 June 2013 - 11:02 PM
Posted 28 June 2013 - 11:36 PM
Posted 29 June 2013 - 02:27 AM
I dumped Antec because they abandoned the Sonata line, and because of the extremely high failure rate(close to 100%) on the SmartPower/TruePower units a few years ago.
Posted 06 July 2013 - 10:23 PM
Xbitlabs or Jonnyguru, or SilentPCReview, might be a good place to start on equipment that is more or less picky, see what's in their forums? Xbitlabs in particular used to test all their power supplies on a UPS and note what maximum load they could get the PSU to while on UPS power.
Looks like you can grab a USB oscilloscope for $250 or so, then seeing waveforms at no load, low load, and near full load...
Posted 08 January 2015 - 03:13 PM
I wonder how hot the lithium ion battery gets, discharging in 12 minutes or so! No fan?
I question the 'up to 8 year' life.. how much battery wear at say 6 years and more? If the battery is fully charged all the time, lithium ion batteries degrade faster with high temperature and SOC%. According to batteryuniversity, a typical lithium ion battery at full charge and at 25 celsius for 1 year gets it's capacity cut to 80% per year. After 4 years it'd be down to 41% capacity or so. But the batteries they tested might not be the best chemistry.
The Nissan Leaf has a newer 'lizard' battery that resists heat degradation compared to the first ones, via chemistry instead of cooling and the Chevy Volt battery so far has very little degradation after 4 years while not charging above 78%SOC or so and aggressive liquid cooling.
So the 20% loss in capacity I suppose is worst case, though, it seems about right for laptop batteries that stay at 95-100% charge all the time.
In year 7 of the UPS battery's life, I bet it is siginificantly degraded unless the UPS is stored in a fridge while being plugged in, though then the battery would have higher internal resistance so can't handle as much load.
Edited by danwat1234, 08 January 2015 - 03:36 PM.
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