Pacific Crest 12V DC SupplyPosted by amdomag on January 31, 2012 at 12:50 pm
I am currently using a 12v car battery for my long range pacific crest radio. Is there commercially available a 12V DC supply unit that can be used in lieu of the car battery? Much lighter is highly preferable. I don’t know if solar panel can provide the convenience we surveyors need in the field.
Sharing your experience is highly appreciated.
- 12 Replies
- MemberJanuary 31, 2012 at 12:57 pm
We have used the type of jump starters for a car in the past. A bit lighter and less bulky.
- MemberJanuary 31, 2012 at 1:40 pm
Can it sustain for a day’s work?
- MemberJanuary 31, 2012 at 3:27 pm
12v marine bats work good. I also power an electric fence with it. I have an optima blue top.
- MemberJanuary 31, 2012 at 5:54 pm
I’ve gone to larger car batteries WITH WARRANTIES. RTK use is hard on a battery. I’ve worked many days until the battery is completely dead. By the time I get home, its a few hours until it gets on a charger. And then do the same thing, again and again. I think batteries will only take so many complete discharges. I bought one last April from a local farm supply store. They scribed the date and store number on the battery as proof that it was from them. I took it back two weeks ago because my charger gave me an error message. The farm supply store tested it and gave me a brand new one at no charge because it was less than one year into the 5 year warranty. If this keeps up, I might never need to BUY a new one again.
- MemberJanuary 31, 2012 at 7:53 pm
Are you asking about off mains power? I have powered using a 12VDC mains supply before, BUT you need to plug in, if you need portable you aren’t going to get much lighter than OEM and power all day, I run using solar and a couple of Optima deep cycle batteries, BUT that is NOT going to be portable, this is to locations I can drive to.
- MemberFebruary 3, 2012 at 12:02 am
An FB friend of mine from Iran told me that he successfully tried using a pack of “A” batteries. Good for a day’s work according to him. If this is possible then maybe other solution can be made if minimum weight is desired.
- MemberFebruary 3, 2012 at 12:16 am
That must of been one big pile of AA batteries! You would have to hook them in series to get 12V (9 x 1.5V = 13.5V which is close to a 12V lead acid battery) and then hook a few of those series packs in parallel to get any sort of amp hours at all, not saying it wasn’t done, BUT doesn’t seem very practical. I would think you would need around 5 of the homemade 9 battery packs tied together in parallel (45 AA cells) to get something usable at all of around 12 AH of 12V power. I think that is still only about 1/3 of the capacity of the battery supplied by Pacific Crest.
- MemberFebruary 3, 2012 at 12:28 am
I see now you said single A, not AA, in the states at least, all A batteries (AA, AAA are common, haven’t seen a single A) are 1.5 volts, so the series part would still apply, if a single A does exist it may have more capacity requiring less total batteries, BUT still seems impractical.
- MemberFebruary 3, 2012 at 6:46 am
When I was tasked to undertake boreholes stakeout for a mine exploration work in a remote place and isolated island, I found no commercially available 12v car battery for sale or for rent leaving me doing nothing for three days. That was the time I realized that situations like what happened can be avoided if there is commercially available portable and very light 12v dc supply that you can bring along in the airports/seaports. If there is, that bad experience could have been avoided.
- MemberFebruary 17, 2012 at 10:00 pm
Try a motor cycle battery, they are compact and fully sealed too.
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