On Tue, 6 Oct 2015 13:48:18 -0700 (PDT), bob haller
wrote:

acorn has a flakey reputation quality wise.

save big bucks BUY USED!

lots of people get one, and then no longer need one

they get better, move, die etc etc.

so lots of nearly brand new units are available

if power failures are common in your area get a UPS for safe operation during power failures
The vast majority today are "self powered" with an onboard battery
like a power wheelchair -some with automatic charging at one end only.
No ups required - just make sure the battery is replaced when it gets
weak.