Why does my 4.8 volt rx batt. read 5.5 volts when I check it?  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Why does my 4.8 volt rx batt. read 5.5 volts when I check it? Page: [1]

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Why does my 4.8 volt rx batt. read 5.5 volts when I che... - 2/15/2002 7:55:35 AM   
catboater



Posts: 382
Joined: 1/7/2002
From: Bothell, WA, USA
Status: offline 		Dugh?????????? Here's a dumb question. When I check my rx batteries with a standard r/c volt meter they often read way over 4.8 volts. How does a 4.8 volt battery get more than 5.5 volts? Shouldn't it just register 4.8 volts when fully charged?
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Why does my 4.8 volt rx batt. read 5.5 volts when I che... - 2/15/2002 8:38:22 AM   
DK64



Posts: 66
Joined: 12/30/2001
From: hanford, CA
Status: offline 		actually, 4.8 v is almost dead and 5.4-5.5 is fully charged and that is assuming that your tester puts a load on it.


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Why does my 4.8 volt rx batt. read 5.5 volts when I che... - 2/15/2002 4:48:39 PM   
HitecRedneck



Posts: 215
Joined: 12/22/2001
From: Kingsland, AR, USA
Status: offline 		On my tester, not loaded, a 1.2 cell when charged will read 1.39 so that works out to 5.56 volts. When the cell is discharged it will read 1.1 so that works out to 4.4 volts.

(in reply to catboater)
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Why does my 4.8 volt rx batt. read 5.5 volts when I che... - 2/16/2002 6:28:11 AM   
Red Scholefield



Posts: 4902
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		Good answers guys. You all get an A+ from UBT.

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batteries - 3/1/2002 7:33:32 AM   
FIVESQUARE



Posts: 625
Joined: 12/9/2001
From: little rock, AR, USA
Status: offline 		You have to get up mighty early to fool one of those Arkansas boys
Mrs. George said that!
5x5
Daniel George

< Message edited by FIVESQUARE -- Mar 20 2002 11:41PM >

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Why does my 4.8 volt rx batt. read 5.5 volts when I che... - 3/8/2002 2:41:02 AM   
Hotwings


 

Posts: 44
Joined: 3/7/2002
From: port charlotte, FL, USA
Status: offline 		i have to agree that 1.2 is nominal for one cell, and when fully charged it should have 1.45 volts per cell. however a pack that is at 4.8 volts is not almost dead. this is the level that will provide longer than any other level. until you get to 4.8 you are running on the top. the battery (a group of individual cells) is not unsafe for flight until it is below 4.8 and dead at 1.1 v per cell. my 9ZHP will alarm when trannie batt gets to 9.2 volts and is considered unsafe below that. 9.6 is normal but most modelers will recharge their trans batt before they let them get to 9.6v and then complain that either the reciever batts or trannie batt don't last long enough. if they would use the radio with the right voltage they would probably get much more than they expect from them. i fly all day on my heli's on one charge and my fellow flyers spend all day charging their radios. c-ya

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Why does my 4.8 volt rx batt. read 5.5 volts when I che... - 3/21/2002 1:28:03 AM   
f2racer



Posts: 1167
Joined: 12/7/2001
From: Bedford, MA, USA
Status: offline 		I see 5.67v regularly after an overnight charge on my 4.8v RX packs. What are other people seeing?

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Why does my 4.8 volt rx batt. read 5.5 volts when I che... - 3/21/2002 6:13:44 AM   
David Root


 

Posts: 22
Joined: 3/6/2002
From: West Buy Golly Shelby NY
Status: offline 		My $.02,

4.8 volts without a load is dead. 4.8 with a load (servo's...) is what the batt is supposed to do.

Check the batts with a load ~200ma. and 4.8 would be fine. The voltage drops with a load.

4.8 static will drop to maybe 4.4 with a load and may not have enough power to run your servo's. Ever see one of those graphs? When you get to the end of the usable part, the voltage drops off like crazy. Good chance of crashing In my opinion.

David Root

(in reply to catboater)
       Post #: 8

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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Why does my 4.8 volt rx batt. read 5.5 volts when I check it?
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