home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.laptops
- Path: sparky!uunet!convex!darwin.sura.net!zaphod.mps.ohio-state.edu!sdd.hp.com!scd.hp.com!hpscdm!cupnews0.cup.hp.com!news1.boi.hp.com!hp-pcd!hp-vcd!edmoore
- From: edmoore@vcd.hp.com (Ed Moore)
- Subject: Re: Laptop on all the time - need UPS? (TI TM4000)
- Sender: news@vcd.hp.com (News user)
- Message-ID: <BxIqDu.FFM@vcd.hp.com>
- Date: Tue, 10 Nov 1992 21:01:05 GMT
- Distribution: comp
- References: <NEAL.92Nov9153720@lever.ATT.COM>
- Organization: Hewlett-Packard VCD
- X-Newsreader: TIN [version 1.1.4 PL6]
- Lines: 23
-
- : Are there any problems running a typical laptop all the time, plugged
- : into the AC power (e.g. a BBS or home control system)?
-
- I ran an early Toshiba T1100 Plus plugged into AC power 9 hours/day, each
- working day for 2 years. The battery finally died at age 3. Its NiCd
- battery probably decreased in capacity (if the "memory effect" is true), but
- the machine worked just fine. The top of the case gets a bit warm.
-
- : In particular, in an area with lots of thunderstorms (Boulder CO)
- : where power surges and 1-second outages seem somewhat frequent, do you
- : need a UPS, or just a good surge protector (MOV or "zero surge" or
- : ??), or does the AC adaptor/laptop battery insulate you from those problems?
- :
- : E.g., is the laptop running off the smooth power flow from the
- : battery, while the AC adaptor trickle-charges the battery?
-
- I believe the T1100 Plus always runs off the battery, while the AC adaptor
- keeps the battery charged. Power outage wasn't a problem. In 1987 we had
- a power failure that killed every computer in the building (a few hundred)
- except mine. I just carried it over under an emergency light and kept
- working. No UPS necessary. I'm not an EE, but I suspect a surge could kill
- the AC adaptor. It cost $70, so maybe it's not worth protecting with a
- surge protector.
-