Dual mini Yellow tops or Single large yellow top?? that is the question

shiftless89 · 07-08-2005, 10:34 AM

I was wondering about doing this. 2 of THESE (ULT-9073-167 bottom of page) batteries occupy about the same size as 1 regular size. would it be smarter to run 2 500ca batteries instead of 1 1000ca battery? one is enough to start and run my everyday use, but the reserve power of 2 seperate smaller batteries seems like it would be better, planning on future upgrades (lights winch ect) but I am no electrical engineer! and would it be better to run in parrallel or series and why???

I have one of these batteries here in the shop. it is used as the auxillary battery in the new RX400h hybrids. it is definitly small!

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shiftless89 · 07-09-2005, 06:58 AM

Holy non-posting batman! I'd at least expected a post from jimabean or waskilly by now!

so from the lack of enthusiasm I guess this is a bad Idea?
I'm trying to increase my electric storage without decreasing my space!

4Crawler · 07-09-2005, 07:06 AM

Parallel is the connection you want, batteries in series add the voltage so unless you are planning to upgrade your vehicle's components to 24 volts, it serves no purpose.

I run 2 smaller AGM batteries in my truck, a pair of 800CA units, fairly easy to drain one in camp, at about 26AH capacity, but then there is the one in reserve:

http://www.4crawler.com/4x4/CheapTri...atteries.shtml

Silver_Truck · 07-10-2005, 12:40 PM

I like the way it sounds...if you do it let us know how it works, I'd like to look into it if it turns out well

07-09-2005, 06:58 AM	#2 (permalink)
shiftless89 Contributing Member Join Date: Jun 2004 Location: fairhope, al Posts: 1,321	Holy non-posting batman! I'd at least expected a post from jimabean or waskilly by now! so from the lack of enthusiasm I guess this is a bad Idea? I'm trying to increase my electric storage without decreasing my space! __________________ 1989 SR5 V6 5sp 4RUNNER. -> MOST VIEWED 1ST GEN ON YOTATECH! www.toyotatrailriders.com Wheeling Texas Style

07-09-2005, 07:06 AM	#3 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 7,828	Parallel is the connection you want, batteries in series add the voltage so unless you are planning to upgrade your vehicle's components to 24 volts, it serves no purpose. I run 2 smaller AGM batteries in my truck, a pair of 800CA units, fairly easy to drain one in camp, at about 26AH capacity, but then there is the one in reserve: http://www.4crawler.com/4x4/CheapTri...atteries.shtml __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

07-10-2005, 12:40 PM	#4 (permalink)
Silver_Truck Contributing Member Join Date: Oct 2004 Location: B'ham, WA Posts: 1,818	I like the way it sounds...if you do it let us know how it works, I'd like to look into it if it turns out well __________________ -Geoff *1991 Toyota Pickup Ext. Cab SR5 4x4 V6 5 spd K&N intake, port & polished heads with OS valves, port & polished intake manifold and plenum, NWOR headers and crossover, NWOR catback, Denso Iridium plugs, Redline Fluids, 4.88s, Rear LockRight, Aisin hubs, Chevy springs, BJ spacers, 2" RB body lift, 34x10.5 Swamper LTBs, WolphisWorks Sliders and bumpers, 400,000 mi.

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