Taperssection.com

Gear / Technical Help => Remote Power => Topic started by: rowjimmytour on July 15, 2005, 01:19:06 PM

Title: R/C 9.6v ????
Post by: rowjimmytour on July 15, 2005, 01:19:06 PM

I wired 3 r/c batteries (9.6v) parrellal and they now total 4,200mah ((2)1600mah+(1)1000mah). I was wondering if anyone else has tried this and has any good or bad experiences w/ power or chargin' or whutever. Thanks in advance.
Peace

Title: Re: R/C 9.6v ????
Post by: rustoleum on July 15, 2005, 01:32:08 PM

using different amp hour ratings will work as far as powering your gear goes, however, the 1.6 aH batteries will be drained by the 1 aH as the 1 aH will try to charge itself from the higher capacity.  This will result in an overall decreased battery life.

Better to stick to the same amp hour when wiring in parallel.  Get yourself another 1.6 and you'll be in business.

Title: Re: R/C 9.6v ????
Post by: bhtoque on July 15, 2005, 02:31:39 PM

what Russ said.

If you need more power you can get a 3 pack of 2000mha's from batteryspace for $25. So much cheaper than the ones ratshack sells.

JAson

Title: Re: R/C 9.6v ????
Post by: rowjimmytour on July 15, 2005, 03:28:36 PM

Thanks but I bought a walmart lithium and wanted to use the R/c batts as back ups so I think I well just remove the 1.0mah.
Peace

Title: Re: R/C 9.6v ????
Post by: bhtoque on July 16, 2005, 03:20:37 AM

Quote from: rowjimmytour on July 15, 2005, 03:28:36 PM

Thanks but I bought a walmart lithium and wanted to use the R/c batts as back ups so I think I well just remove the 1.0mah.
Peace

Can't blame you. I bought a 2nd one when they were on close out.

Well, as back-up back-up the 1ah will run a ua-5 for almost 2 hrs.

JAson

Title: Re: R/C 9.6v ????
Post by: rowjimmytour on July 17, 2005, 06:23:58 PM

Thats for my SVU1!!

Title: Re: R/C 9.6v ????
Post by: Karl on July 20, 2005, 04:39:59 PM

Quote from: rustoleum on July 15, 2005, 01:32:08 PM

using different amp hour ratings will work as far as powering your gear goes, however, the 1.6 aH batteries will be drained by the 1 aH as the 1 aH will try to charge itself from the higher capacity.  This will result in an overall decreased battery life.

Better to stick to the same amp hour when wiring in parallel.  Get yourself another 1.6 and you'll be in business.

Even though rowjimmytour's questions have been answered, I want to provide a useful tip in this kind of situation.

When using batteries in parallel, it's a good idea to insert diodes into the + leads of each battery.  Even if they are the exact same batteries, you should do this (because "identical" batteries are never identical in behavior).  As you run batteries, the voltage levels will change between the batteries.  Without diodes, the higher voltage batteries will drain into the lower voltage batteries.  The diodes will prevent that from happening.  One thing to keep in mind, though, is that diodes generally have a small voltage drop, so if what your trying to power is picky then that could be a problem.

Food for thought.

Title: Re: R/C 9.6v ????
Post by: rowjimmytour on July 23, 2005, 08:07:45 PM

Should the diode have the anode or the cathode towards the battery(or source of power)??? Does it matter if it is a zener or silicone diode? Also +t for all your help.
Peace

Title: Re: R/C 9.6v ????
Post by: Karl on July 24, 2005, 01:47:21 AM

Quote from: rowjimmytour on July 23, 2005, 08:07:45 PM

Should the diode have the anode or the cathode towards the battery(or source of power)??? Does it matter if it is a zener or silicone diode? Also +t for all your help.
Peace

I'm not sure the difference between zener and silicone, but I'd guess that either would be fine.

The arrow should be pointing away from the batt.

Also, don't make the silly mistake of trying to charge the batts with the diodes in the line.

Glad to help, and good luck!