Ken Martin's posts

Posted by Ken Martin on Jun 3, 2009 12:52 pm

#1 -  Renewable Energy > RE General Discussion > Re: Power needed for remote wireless signal repeater
This shouldn't be a problem. We use multiple types of wireless radios from many different suppliers. They range from Free Wave 900 mhz ethernet radios that use 12 vdc @ 100 ma to larger higher power output tropos routers that use
24 vdc @ 3.5 amps. I work with a Govt Agency that use a wide variety of batteries for remote location surveillance work. The batteries we choose are Lithium and are called
BA-5590 these are Lithium SO2 and are not rechargable and expensive to purchase($50ea) but work well when a few are used in a series circuit arrangenment. The higher the amperage that is drawn the more batteries we add to the series circuit.
Their is also a re-chargeable version of this battery they are called BB-390B/U These are Nickel Metal Hydride NiMH and their cost($240.00ea) but they are rechargeable. They work well but need to be re-charged as used.
On sites we use Solar charging power supplies(batteries) we use Gel Cell Batteries that are usually 6 volts ea. We then configure these in a parallel circuit to give us 12 vdc while arranging them into a series circuit as well to take the amperage use off the batteries. The reason we use lower voltage gel cells is they are Great! for solar charging arrnagements and don't cost alot. Even re-chargeable batteries need to be replaced every so often.
You my freind could use common 9vdc lithium batteries built in a circuit to give you your needed fov and get alot of use from that remote router.Even if a router is sitting with no traffic it still is drawing power. The only thing that changes is traffic which equals trasnsmissions which equals power use. If using any type of commercial lithium batteries Never!! use batteries manufactured in China, they are very poor quality and last maybe! 1/3 of the American made batteries. If ordering over the internet, you need to specify--Made In USA-Only! or they will send you Foriegn import batt's. Hope I helped, I'll check again to see if other questions come up.  Thank You,    KM,
 

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