[Elecraft] UPS Can Be a Noise Source

[Lynn W. Taylor, WB6UUT]

It's not a bad design goal if you can plan on only 1 or 2 outages per 
year, if that.  Probably not too bad if the generator kicks in and you 
only abuse the batteries for a few minutes.

My observation was that the big APC units charged at about half the 
discharge rate, so yeah, charging too fast, but the discharge did more 
harm than charging.

I was a 16 year old kid working his first real job in an auto parts 
store just after cars switched from 6v to 12v.  We could order 8 volt 
lead-acid batteries, and I always thought that 6+8 was 14.....

73 - Lynn

On 8/31/2017 2:53 PM, Jim Brown wrote:
> Second, a local computer guru, AE6KS, has observed that most UPS mfrs 
> charge batteries at too fast a rate for good battery life. The objective 
> is to have the unit ready to do it all again if power drops, then 
> returns, then drops again.  This intentional design goal kills batteries 
> pretty quickly.