At least 6 months maybe a little more. I generally do not have the engine running when I do a site survey and my laptop has a 12v adapter.
Mark McElvy AccuBak Data Systems, Inc. 573.729.9200 - Office 573.729.9203 - Fax 573.247.9980 - Mobile http://www.accubak.com/ http://www.accubak.net/ Nationwide Internet Access Accurate backups for your critical data! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rick Smith Sent: Tuesday, October 31, 2006 7:36 AM To: 'WISPA General List' Subject: RE: [WISPA] Powering 12-volt CPE via battery for site surveys how long have you been doing it tho ? I saw no issues for 3 - 4 mnths, then BAM! No alternator. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark McElvy Sent: Monday, October 30, 2006 10:38 AM To: WISPA General List Subject: RE: [WISPA] Powering 12-volt CPE via battery for site surveys I use a 100 and 300 watt in my 99 F-350 with the engine running and not running without any issue... Mark McElvy AccuBak Data Systems, Inc. 573.729.9200 - Office 573.729.9203 - Fax 573.247.9980 - Mobile http://www.accubak.com/ http://www.accubak.net/ Nationwide Internet Access Accurate backups for your critical data! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Nash - Lists Sent: Monday, October 30, 2006 9:34 AM To: WISPA General List Subject: Re: [WISPA] Powering 12-volt CPE via battery for site surveys Hmmm... At first I had an '84 Chevy Van w/14'x7'x7' box on the back with a 1000 watt inverter. Now I have a 2004 Ranger with a 100 watt inverter. I have never used the inverters with the motor running, though, so it won't affect the alternator. Mark Nash Network Engineer UnwiredOnline.Net 350 Holly Street Junction City, OR 97448 http://www.uwol.net 541-998-5555 541-998-5599 fax ----- Original Message ----- From: "Rick Smith" <[EMAIL PROTECTED]> To: "'WISPA General List'" <[email protected]> Sent: Monday, October 30, 2006 4:10 AM Subject: RE: [WISPA] Powering 12-volt CPE via battery for site surveys > be careful using inverters. I've used several, on two different trucks in > my span here, > and burned out the alternator in short order in both trucks. One was a > Jeep > Grand Cherokee, the latest a Ford Expedition with the high output > alternator.... > > Running too many amps through the inverters puts a REALLY heavy load on > the > alternator... > > I've used an inverter in the past to power laptop, trango, canopy, > routerboard and tranzeo setups in varying degrees. > > I'm convinced that frequent usage of the inverters kills the alternator. > > Now, I just leave with a laptop fully charged and a couple of charged > dewalt > 18V batteries that power my radio setup. The dewalts last from 1 to 2 > hours > which is more > than enough time. If we're surveying at a customer's home, we use their > power to > power the radios and recharge my laptop :) > > R > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Mark Nash - Lists > Sent: Sunday, October 29, 2006 11:53 PM > To: WISPA General List > Subject: Re: [WISPA] Powering 12-volt CPE via battery for site surveys > > I use a 100 watt inverter that plugs right into the cigarette lighter > power > port. May not power the laptop (haven't tested) but the CPE will stay on > for much longer for an hour. > > Mark Nash > Network Engineer > UnwiredOnline.Net > 350 Holly Street > Junction City, OR 97448 > http://www.uwol.net > 541-998-5555 > 541-998-5599 fax > ----- Original Message ----- > From: "KyWiFi LLC" <[EMAIL PROTECTED]> > To: "WISPA List" <[email protected]> > Sent: Sunday, October 29, 2006 2:29 AM > Subject: [WISPA] Powering 12-volt CPE via battery for site surveys > > >> What is the best way to power a 12-volt radio for 30 - 60 minutes >> before requiring a re-charge? (solution must be re-chargeable via auto >> adapter) >> >> We are wanting to use an actual CPE radio with a 19dBi panel >> antenna, connected to an iPAQ/Axim so we are needing a re-chargeable >> power source for the radio. >> >> BTW, we tried a 9-volt battery but it only kept the radio powered up >> for 5 - 10 minutes. >> >> Would something like http://tinyurl.com/vgm4n work? >> >> >> Shannon D. 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