Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
APM/TMB 115/805 APO Celestron ED-80 Celestron 9.25
CG-5 Vixen Porta II
Naglers: 17T4, 13T6, 3-6 zoom UWANs: 28mm, 7mm Pentax 10XW, 10mm Radian
Misc EP: 50mm Parks, 42mm GSO, 2x TV Barlow, sundry plossls...
Explore Scientific ED127Explore Scientific AR152Celestron Omni XLT 102 Orion XT10i
Orion SkyQuest XX14i
“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
12" DSH 8" f/4 Vega MakNewt
Quote:Too weak for what? Not for the original question. I've powered the CG-5 with a 7AH Power tank for 2-3 consecutive 4-5 hr. sessions without recharging.
If you are going to be adding dew-heaters, iPads, Macbooks and the Space Shuttle, then, of course, you need more power.
Quote:It's quite funny how every post asking about power ends up as some sort of contest for who uses the largest array of batteries.
Quote:I power my CG-5, Netbook and Camera with this packhttp://www.harborfreight.com/12-volt-jump-start-and-power-supply-38391.html?c...if you have a harbor freight tools in your area snag it while its on sale for 50 bucks. mine will run my mount only all night long (6+ hours easily) or it will run my mount + camera + netbook for about 3 hours, if i'm smart i'll disconnect my netbook and run off its battery after 2 hours and when doing this i have managed 6 hours of imaging time on this battery pack! even then its still not dead, its just my camera's power adapter will drop below "acceptable" voltage for my camera and it shuts down. one time a month ago while doing an overnight imaging camp out i hit the sac at 3:30 am and my camera and netbook died around 4:00-4:15 AM or something but the mount was still on and tracking when i woke up at 7 AM
Quote:Has anyone tried those inexpensive 12v lithium batteries from eBay? I have one that is 3800mAH, cost $30 shipped, and is about the size of and weighs about as much as a deck of cards.I was originally not planning on using it with a mount, though I have tried it on my new Vixen GP2 with DD3 (not goto). It worked fine for 2.5 hours until I gave out at 3am. I have no idea how much longer it would work as I have only one use with it so far.There are other models around 6800, 9600, 15000, and 20000 mAH, and all are quite light compared to SLA batteries.Any other experiences?Keith
10Micron GM2000HPS, 10Micron GM1000HPS, SW NEQ6 Takahashi FSQ106 EDX III, SW 190MN, TS Riccardi 130 f/5.2 SBIT ST-8300M, QSI 683wsg8 SX Wheel, Baader 2" filters, Baader 36mm filters, Astrodon QSI filters http://astro.frejvall.se
Quote:If lead-acid batteries are considered, choose an AGM one. A normal car battery will be damaged when drawn below around 11.5 volts, a "leisure" battery will be somewhat more tolerant, a lead-acid gel battery even better and an AGM one can basically be shorted to zero with no damage. They're a bit more expensive but well worth the extra money./per
Quote:am curious, how do you tie into 3 things at once with one 12v plug in (cigarette lighter) source? mount, camera, notebook? thank you, Kasey