Batshare on 4.8V
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From: st. charles, MO
The smart-fly website an other sources reviewed concerning the Batshare product all give examples using 6.0v batteries or Lipo's with regulators, but I don't see any information indicating I can use it with 4.8v batteries, which I currently have a lot of.
Can you use the Batshare with 4.8v Nicad/Nimh batteries?
Can you use the Batshare with 4.8v Nicad/Nimh batteries?
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Not sure why Bob hasn't been on here lately he's usually pretty good about answering questions here, but since you've not heard I'll run a bit of information past you.
I don't think the BatShare is recommended for 4.8 volt systems as there is a small voltage drop across the device, .5 volt IIRC so that would leave you dangerously close to minimum operating voltages for your rx and servos.
I know the recommended setup for Li-Ions is to run the BatShare in front of the regulators because of this voltage drop and that's how mine is setup.
I don't think the BatShare is recommended for 4.8 volt systems as there is a small voltage drop across the device, .5 volt IIRC so that would leave you dangerously close to minimum operating voltages for your rx and servos.
I know the recommended setup for Li-Ions is to run the BatShare in front of the regulators because of this voltage drop and that's how mine is setup.
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From: st. charles, MO
Thanks for the info. As I read other posts I saw that there was a diode in the batshare and also thought about the voltage drop across it, but its good to get confirmation.
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From: Tempe,
AZ
Hi,
My automatic notification seems to have been turned off and I relied on that mostly to know when posts are made. Please accept my appologies.
Zeeb is right, there is a 0.5V drop across the BatShare so running with 4-cell packs will not work. When the packs get to 4.8V the system will
see about 4.3 volts which is too low. Please let me know if you have any other questions.
My automatic notification seems to have been turned off and I relied on that mostly to know when posts are made. Please accept my appologies.
Zeeb is right, there is a 0.5V drop across the BatShare so running with 4-cell packs will not work. When the packs get to 4.8V the system will
see about 4.3 volts which is too low. Please let me know if you have any other questions.
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From: Irving, TX
I just came across this thread, and am now very concerned. The website and instructions quote 6V, but say nothing about not working with 4.8v 4-cell.
I have a number of models, and I use dual-battery systems on all for extra safety. They are all 4-cell 4.8V 2000 to 2800 NiMH and all use the batshare device. So far I've had no problems, maybe because I keep my RX batteries charged, and check voltage before every flight. However, if Smart-Fly do not recommend 4.8V 4-cells, they need to make sure this is stated very clearly. Do I now strip-out all my systems on the chance of a failure? That's going to be expensive for 9 airplanes, or do I change all to 6V 5-cell, even more expensive?
I have a number of models, and I use dual-battery systems on all for extra safety. They are all 4-cell 4.8V 2000 to 2800 NiMH and all use the batshare device. So far I've had no problems, maybe because I keep my RX batteries charged, and check voltage before every flight. However, if Smart-Fly do not recommend 4.8V 4-cells, they need to make sure this is stated very clearly. Do I now strip-out all my systems on the chance of a failure? That's going to be expensive for 9 airplanes, or do I change all to 6V 5-cell, even more expensive?
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From: Tempe,
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Hi Nibs,
I am very sorry there is a misunderstanding here. We felt that saying on the packaging that the BatShares have a 0.47V drop across them it would be clear enough that with a 4.8V pack this voltage drop would result in a very low receiver voltage. I guess we just did not see the error in this since our market is mostly large scale planes. We did not think to explicitly state that these should not be used with 4-cell packs. Again, I am very sorry for the confusion.
I am very sorry there is a misunderstanding here. We felt that saying on the packaging that the BatShares have a 0.47V drop across them it would be clear enough that with a 4.8V pack this voltage drop would result in a very low receiver voltage. I guess we just did not see the error in this since our market is mostly large scale planes. We did not think to explicitly state that these should not be used with 4-cell packs. Again, I am very sorry for the confusion.



