I have my old "dead" UPS serving as a battery backup for my alarm clock. Works great. Also works for VCRs... for when there's a power outage and you have a program set to be recorded during that time.
Don't recommend connecting car's liquid (forget which type of acid it is) 12V battery to the UPS's battery... different types of rechargeables have different behavior and they got different circuits that work with different types of batteries. I don't know enough to know whether it's safe, but I know enough to say it's not safe to do that without knowing that it's safe. Oh, BTW... car battery emits hydrogen gas while it's recharging. Explosive... I don't recommend it for indoor use. -Mark On Tue, 2 Mar 2004, Rod Roark wrote: > I have had an APC Back-UPS 500 for a few years and it looks > like the battery is finally dead. It's a small 12V sealed > lead-acid battery, about 6" x 2.5" x 3.5". The back of the > UPS says it can output 10A of current. The battery itself > says "12V, 7AH/20HR". > > One thing I never liked about this UPS is the anemic backup > power time, about 5-10 minutes (and now zero). > > I guess you know where this is going... am wondering if it > makes sense to buy a standard (sealed) car battery and wire > it up to the UPS? Any EE experts here care to comment? > > Thanks, > > -- Rod -- Mark K. Kim AIM: markus kimius Homepage: http://www.cbreak.org/ Xanga: http://www.xanga.com/vindaci Friendster: http://www.friendster.com/user.jsp?id=13046 PGP key fingerprint: 7324 BACA 53AD E504 A76E 5167 6822 94F0 F298 5DCE PGP key available on the homepage _______________________________________________ vox-tech mailing list [EMAIL PROTECTED] http://lists.lugod.org/mailman/listinfo/vox-tech
