This type of AGM battery is the way to go if you're stringing batteries off a UPS. They are sealed so you don't need to worry about hydrogen venting, explosions, permits if it's being installed in a building, etc. Plus the standard chargers in APC UPSes are designed for use with AGM batteries, not flooded cell lead acid like you find at Wal-Mart.
One thing to keep in mind when buying AGM batteries: find the actual datasheet for the battery and find out at what discharge rate the battery capacity is specified. Some of the cheap chinese batteries are rated at a slower discharge rate, which artificially inflates their capacity when compared to batteries rated at the standard 20 hour discharge rate. Also when doing runtime calcs you need to look up the capacity for the discharge rate you will be using in order to get an accurate number. Patrick Shoemaker Vector Data Systems LLC [email protected] office: (301) 358-1690 x36 http://www.vectordatasystems.com Travis Johnson wrote: > Hi, > > I just bought some today for one of our bigger tower sites. We will > install four of these connected to an APC SmartUps 1400 and will > probably get 30+ hours of uptime (this site has multiple switches, > routers, point to point links, licensed links, rebooter and over 10 AP's). > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=250316783682 > > The real killer is the shipping. These things each weigh about 110 > pounds (and they don't have any handles). But they are very nice > batteries. We have about 44 of them installed at our bigger tower sites. > > Travis > Microserv > > Leroy wrote: >> Gino, >> >> What batteries are you using? I've seen posts of your UPS setup in the past, >> very nice. >> >> Leroy >> >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Gino Villarini >> Sent: Wednesday, January 21, 2009 8:28 PM >> To: WISPA General List >> Subject: Re: [WISPA] We're being DDOS'd by DC! >> >> The bigger the ups the better charger it has, typically we use 1400 and >> 1500 units >> >> >> Gino A. Villarini >> [email protected] >> Aeronet Wireless Broadband Corp. >> tel 787.273.4143 fax 787.273.4145 >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Marlon K. Schafer >> Sent: Wednesday, January 21, 2009 2:49 PM >> To: WISPA General List >> Subject: Re: [WISPA] We're being DDOS'd by DC! >> >> I wondered about just swapping out the batteries on my APC units and >> instead hooking the units to bigger batteries. My fear is that the >> chargers won't hold up to long charge times that would be needed for a >> big marine battery instead of a little exit light battery.... >> >> Thoughts? Anyone already tried this? >> marlon >> >> ----- Original Message ----- >> From: "jp" <[email protected]> >> To: "WISPA General List" <[email protected]> >> Sent: Wednesday, January 21, 2009 8:36 AM >> Subject: Re: [WISPA] We're being DDOS'd by DC! >> >> >> >>> I like the tripplite APS 700hf/750/1250 gear. >>> >>> We've got sites with 2 big batteries that should be good for 24 hours >>> with these. >>> >>> I put one at my house after going through 2 APC UPSs in 8 years. >>> >>> We put them everywhere we need long run time, and add batteries for >>> places where it's impractical to take a generator. >>> >>> I don't mind freely recommending them. My competition has already seen >>> how well they work at a mountaintop site where we are both located and >>> has since followed that route in the interest of long runtime. >>> >>> On Wed, Jan 21, 2009 at 07:07:19AM -0800, Marlon K. Schafer wrote: >>> >>>> Yeah. But they don't last forever. >>>> >>>> I've also found that they drain faster than they charge too. >>>> >>>> Right now I have rolling power outages in at least 4 towns spread out >>>> >> by >> >>>> a >>>> good 80 miles via road. The power is on, then off then on then off. >>>> It's >>>> not like I can just got to town A and fire up a generator. >>>> >>>> Plus, these towns combine for a total of 11 sites! I don't have that >>>> >> >> >>>> many >>>> generators. >>>> >>>> Wanna know the funny part? In Wilbur, AT&T's cell tower has been >>>> >> down >> >>>> more >>>> than I have! grin >>>> >>>> People still had phone service most of the time. One of the cell >>>> >> phone >> >>>> companies stayed up. If there was NO communications infrastructure >>>> >> in >> >>>> place >>>> I'd have worked harder to keep things running. Without help and a >>>> >> lot >> >>>> more >>>> generators/gas cans it just wasn't possible though. >>>> >>>> The weather is supposed to break today or tomorrow. I don't know >>>> >> how >> >>>> long >>>> it'll take to clean up all of the broken limbs etc. though. >>>> >>>> laters, >>>> marlon >>>> >>>> ----- Original Message ----- >>>> From: "George Rogato" <[email protected]> >>>> To: "WISPA General List" <[email protected]> >>>> Sent: Tuesday, January 20, 2009 9:22 PM >>>> Subject: Re: [WISPA] We're being DDOS'd by DC! >>>> >>>> >>>> >>>>> Don't you have battery back ups? >>>>> >>>>> >>>>> Marlon K. Schafer wrote: >>>>> >>>>>> Looks pretty normal around here. But some of our towers are >>>>>> >> offline >> >>>>>> again >>>>>> due to all of the power outages. >>>>>> marlon >>>>>> >>>>>> ----- Original Message ----- >>>>>> From: "Eric Tykwinski" <[email protected]> >>>>>> To: "'WISPA General List'" <[email protected]> >>>>>> Sent: Tuesday, January 20, 2009 9:52 AM >>>>>> Subject: Re: [WISPA] We're being DDOS'd by DC! >>>>>> >>>>>> >>>>>> >>>>>>> Everyone on NANOG has been saying the same. We're actually >>>>>>> >> seeing >> >>>>>>> close >>>>>>> to >>>>>>> triple on downloading today, starting about 9AM EST. >>>>>>> Thankfully no issues on capacity at all on our end... >>>>>>> >>>>>>> I'm actually surprised the sites serving the videos aren't having >>>>>>> >> any >> >>>>>>> issues >>>>>>> yet. >>>>>>> >>>>>>> -----Original Message----- >>>>>>> From: [email protected] >>>>>>> >> [mailto:[email protected]] >> >>>>>>> On >>>>>>> Behalf Of David E. Smith >>>>>>> Sent: Tuesday, January 20, 2009 12:46 PM >>>>>>> To: WISPA General List >>>>>>> Subject: [WISPA] We're being DDOS'd by DC! >>>>>>> >>>>>>> Not really, but is everyone else seeing lots of extra traffic >>>>>>> >> from >> >>>>>>> people >>>>>>> streaming inauguration-related events in DC? My network is >>>>>>> >> pulling >> >>>>>>> basically >>>>>>> double the traffic of a "normal" Tuesday. >>>>>>> >>>>>>> (There's a lesson about capacity planning in here somewhere...) >>>>>>> >>>>>>> David Smith >>>>>>> MVN.net >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >> ------------------------------------------------------------------------ >> ---- >> >>>>>>> ---- >>>>>>> WISPA Wants You! 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Join today! >>>>>> http://signup.wispa.org/ >>>>>> >>>>>> >> ------------------------------------------------------------------------ >> -------- >> >>>>>> WISPA Wireless List: [email protected] >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>> >>>>> >> ------------------------------------------------------------------------ >> -------- >> >>>>> WISPA Wants You! Join today! >>>>> http://signup.wispa.org/ >>>>> >>>>> >> ------------------------------------------------------------------------ >> -------- >> >>>>> WISPA Wireless List: [email protected] >>>>> >>>>> Subscribe/Unsubscribe: >>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>> >>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>> >>>> >>>> >>>> >>>> >> ------------------------------------------------------------------------ >> -------- >> >>>> WISPA Wants You! 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