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  #1  
Old 04-26-2014, 07:06 AM
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ColoRv ColoRv is offline
 
Join Date: Apr 2012
Location: Denver (FTG)
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Default TCW Battery Backup Experiences?

I've had my IBBS from TCW for about 16 months. It's been flying for 20 hours now. During the construction phase, I kept it connected to my main battery and kept both charged.

My startup procedure is to turn on the IBBS system to boot the Garmin system while I put on seatbelts etc. Last flight (flight number 12 or so) the Garmin system was shutting down before I even got my seatbelts on. After the flight I performed a test on the IBBS to see how long it would keep the Garmin two screens and ADAHARS up....about one minute later it started shutting down. I checked the wiring first and all is as it should be so called TCW and sent it back. They said I had a bad cell, charged me $107 and it's in the mail back to me now.

My question is, how often will I have to do this? The lifespan seems awfully short and during flight the efis showed no issue with the backup battery other than a slightly increased voltage at startup which TCW says is indicative of the charging circuit doing its thing. I wouldn't have known the battery was useless if I hadn't tested it...which sorta negates the reason for carrying its weight around.

Anyone else have any experience with this system? I find myself wondering if I wouldn't have been better off installing a standard battery in it's place. Certainly cheaper. I could have bought an odyssee for what this repair cost and if the lifespan of a nickel metal-hydride battery is this short.....why bother?
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Last edited by ColoRv : 04-30-2014 at 12:29 AM.
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  #2  
Old 04-28-2014, 07:40 PM
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ColoRv ColoRv is offline
 
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Default

Am I the only one to install one of these?
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  #3  
Old 04-28-2014, 07:54 PM
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jthocker jthocker is offline
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Default

Bill,
I have been flying with my TCW for almost 2 years now, backing up my G3X.
So far it's been flawless. Of course I haven't tested it, so who knows.
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  #4  
Old 04-28-2014, 10:19 PM
rkochcyxh rkochcyxh is offline
 
Join Date: Oct 2005
Posts: 75
Default TCW Battery

Hi Bill
I've had the TCW IBBS backup battery for about 3 1/2 years. For the first two years I did nothing so naturally my battery went dead. I sent it back and paid to get it fixed. When they sent me the repaired unit , I also ordered a charger for this battery. So every two months for the rest of my build I would charge the battery. So far I have about 90 hrs on the plane. When I go flying I turn on the IBBS system and it starts my 2 G3X's while I'm getting ready to start the engine . So far it's working the way it's suppose to. I didn't fly for about two months ,Feb and March and the battery went dead. Quick charge and it was back to normal. I fly about two hrs a week.
Russel Koch
RV9A
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  #5  
Old 04-28-2014, 10:53 PM
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ColoRv ColoRv is offline
 
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Default

Russel, what discharged it during the down time?

I think you and Joe may want to turn them on to see how long they will run your system. My repaired one arrived today and I intend to test it fairly often from now on.
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  #6  
Old 04-29-2014, 07:21 AM
HSANTIBANEZ HSANTIBANEZ is offline
 
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Location: Chile, Valparaiso
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Default

I have the IBBS and works great but some times when i dont fly over a week or two the battery lost his charge so i use the ibbs wall charger and the battery gets charged fully again.
On Osh i ask TCW people for the life time of the battery and they told me that it has about 2 or 3 years, then you have to change the battery sending the unit.

I think i will wait until the new Li-Fe-PO4 6ah were available to change mi 4 ah NI-MH old one.

You have to full charge the battery and make a test with the equipment on. If you have less than 30 min you have to change the bat.
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  #7  
Old 04-29-2014, 08:31 AM
Sid Lambert Sid Lambert is offline
 
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Location: North Atlanta
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Default

Bill,

I had exactly the same experience as you. Mine sat while I rebuilt the engine and never took a charge again. Sent it to them and $105 later it's sitting in my office waiting to go back in the plane.
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  #8  
Old 04-29-2014, 08:45 AM
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Tumper Tumper is offline
 
Join Date: Dec 2007
Location: Aubrey, TX
Posts: 336
Default What should I be doing?

I have had my IBBS battery about 9 months now while I am in the final build process. Ever few months I turn on the master and IBBS with a small charger on the main battery for an hour or so. From what I read this should charge the IBBS battery.

Should I be doing something different?
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  #9  
Old 04-29-2014, 12:51 PM
Strasnuts Strasnuts is offline
 
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Location: Salt Lake City, Utah
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Default iBBS

I have an RV10 with G3X backed up by an iBBS. I use mine on every flight for startup. I have had mine for four years now and it still is working great. I just did a conditonal inspection and tested the iBBS. It backed up my two screens for almost an hour. If I'm still in the air that long I should receive the Darwin award. I have been really happy with mine and recommend it as a back up and for start up. I'm also looking forward to the 3 ah Lifepo for my SuperSTOL.
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  #10  
Old 04-29-2014, 01:00 PM
ka6dan ka6dan is offline
 
Join Date: Apr 2008
Location: Dunnellon Fl
Posts: 161
Question

When I wired my unit up I connected a trickle charge wire thru a 1 amp breaker. Isn't that adequate to keep the unit charged, as long a the main battery holds an adequate charge?
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