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All Forums >> RC Airplanes >> Questions and Answers >> Charging
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Charging - 6/22/2006 4:44:22 AM   
zoomerdave


 

Posts: 3
Joined: 3/4/2006
From: dearborn, MI, USA
Status: offline 		If you fully charge your receiver battery and transmitter , how long will it hold its charge if not used . Say if you charge it up and cant get to fly for a week , should the charge still be good ? Also how long can you leave the radio on the charger [ say you forget to unplug ] . Thank you in advance .
       Post #: 1

RE: Charging - 6/22/2006 5:26:34 AM   
sj3


 

Posts: 24
Joined: 5/27/2006
From: , CA, USA
Status: offline 		I have noticed that batteries dont lose much voltage. I dont use my car transmitter and it stays close to the same voltage for a couple months. Every battery loses voltage. When I leave my lipo's sitting for a week I dont notice a difference in my flight time. I think the radio can charge for 18 hours. I forget to unplug it sometimes and its fine after 2 days.

(in reply to zoomerdave)
       Post #: 2

RE: Charging - 6/22/2006 6:39:01 AM   
Semi Retired Aviator



Posts: 476
Joined: 9/20/2003
From: Melbourne Victoria, AUSTRALIA
Status: offline
My observation with NiCd's is that using the built in voltmeter on my Tx, fully charged it may reach 11.6 volts. Left alone for a week it will probably drop to 10.9 volts, but stays there for a couple of weeks.

That's borne out on an expanded scale volt meter on the Rx batteies also. It drops quickly to about 90% max, but it takes a long time to get to 85%.

Having said all that, I charge for 12 hours minimum the night before flying, and I haven't detected any ill effect from overcharging of NiCd's.

Run a search for Red's Battery Clinic; Red's the guru of batteries.

< Message edited by Semi Retired Aviator -- 6/22/2006 11:31:13 AM >

_____________________________

Giver her some more power.......She won't take any more!

(in reply to sj3)
       Post #: 3

RE: Charging - 6/22/2006 4:28:57 PM   
Rodney



Posts: 4774
Joined: 12/8/2001
From: FL
Status: offline 		Voltage is not a good indication of how much energy is left in the battery when you are talking about NiCad or NiMh. NiCads will loose about 1 to 2 % of their capacity per day and NiMh discharge nearly twice as fast. LiPo and PB are much better at retaining energy and on them, voltage does indicate remaining capacity quite well.

(in reply to Semi Retired Aviator)
       Post #: 4

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