Lipo-how do you know when.....
#16
Tech Addict
and if your just to lazy to look
http://www.rcgroups.com/forums/showthread.php?p=1199486
http://www.rcgroups.com/forums/showt...hreadid=139208
http://www.rcgroups.com/forums/showthread.php?p=1199486
http://www.rcgroups.com/forums/showt...hreadid=139208
#17
Tech Fanatic
iTrader: (11)
Hmmm...so the charger is stopping at what it says is 8.4V but the multimeter is coming in lower? So one of them has to be wrong then as long as you are checking with the multimeter right after taking it off the charger. Got a spare charger or a friend's you could test with?
#18
Its charging now, as soon as it comes off charge, ill check it with the multimeter.
Buy the way, I havnt over discharged this battery, i was wondering what the symtoms are in case i ever do.
Buy the way, I havnt over discharged this battery, i was wondering what the symtoms are in case i ever do.
#19
OK, straight off charge:
Surpernova 8.42
Muti meter: 8.34
Through Balance port: Both are reading 4.17 with multimeter
Surpernova 8.42
Muti meter: 8.34
Through Balance port: Both are reading 4.17 with multimeter
#20
Tech Fanatic
iTrader: (11)
and if your just to lazy to look
http://www.rcgroups.com/forums/showthread.php?p=1199486
http://www.rcgroups.com/forums/showt...hreadid=139208
http://www.rcgroups.com/forums/showthread.php?p=1199486
http://www.rcgroups.com/forums/showt...hreadid=139208
Can you find picture/video/stories about Orion packs having this same scary problem? I'd like to see you try...
#21
Tech Regular
iTrader: (4)
one charger may read 8.4v another 8.35 another 8.45...
obviosly with regards to lipo, if your charger reads a higher voltage than what it actually is, then its a good thing (in terms of safety and longevity of the lipo) because it will slightly undercharge the lipo to 8.32v
what happens when a charger actually charges at a ccv at 8.45v? could be a safety risk
#22
I'll have to get my Mutimeter tested against a calibrated MM to see how far out it is and go from there.
So, its safe to say, that if I charge my Lipo and its only getting a voltage of say 8.0v, I should worry?
So, its safe to say, that if I charge my Lipo and its only getting a voltage of say 8.0v, I should worry?
#24
OK, I need a bit more info.
So with Lipos, you cant fully discharge it, so when it comes to charging, your charger will say for example 3500mah was put in during that particular charge, so how do you know for sure that your Lipo is capable of its full 4800mah? if at 4800mah, you lipo should read 8.4 volts, so say that if your Lipo is fully charge now at say 4000mah, the voltage will read lower.
So in a round about way, 8.4v will only be read at a fully charged 4800mah?
So with Lipos, you cant fully discharge it, so when it comes to charging, your charger will say for example 3500mah was put in during that particular charge, so how do you know for sure that your Lipo is capable of its full 4800mah? if at 4800mah, you lipo should read 8.4 volts, so say that if your Lipo is fully charge now at say 4000mah, the voltage will read lower.
So in a round about way, 8.4v will only be read at a fully charged 4800mah?
#26
Bugger hey, Ill give that a miss I think. They cost $300 here in Australia.........
#27
Tech Elite
iTrader: (49)
and if your just to lazy to look
http://www.rcgroups.com/forums/showthread.php?p=1199486
http://www.rcgroups.com/forums/showt...hreadid=139208
http://www.rcgroups.com/forums/showthread.php?p=1199486
http://www.rcgroups.com/forums/showt...hreadid=139208
#28
Tech Lord
iTrader: (22)
chart 1
This link has a chart that shows a 7.4 will peak at 8.4 volts and test after the charge any where from 8.32 volts to 8.44. I assume thats why there rated nominal. Each pack can be a little better than the next.
Chart 2
I think is the burst that each cell can handle not sure though.
Accessing this site it wont load for me on some links.
http://lib.store.yahoo.net/lib/toytr...iPo-Safety.pdf
Good stuff.
This link has a chart that shows a 7.4 will peak at 8.4 volts and test after the charge any where from 8.32 volts to 8.44. I assume thats why there rated nominal. Each pack can be a little better than the next.
Chart 2
I think is the burst that each cell can handle not sure though.
Accessing this site it wont load for me on some links.
http://lib.store.yahoo.net/lib/toytr...iPo-Safety.pdf
Good stuff.
#29
Tech Lord
iTrader: (22)
OK, I need a bit more info.
So with Lipos, you cant fully discharge it, so when it comes to charging, your charger will say for example 3500mah was put in during that particular charge, so how do you know for sure that your Lipo is capable of its full 4800mah? if at 4800mah, you lipo should read 8.4 volts, so say that if your Lipo is fully charge now at say 4000mah, the voltage will read lower.
So in a round about way, 8.4v will only be read at a fully charged 4800mah?
So with Lipos, you cant fully discharge it, so when it comes to charging, your charger will say for example 3500mah was put in during that particular charge, so how do you know for sure that your Lipo is capable of its full 4800mah? if at 4800mah, you lipo should read 8.4 volts, so say that if your Lipo is fully charge now at say 4000mah, the voltage will read lower.
So in a round about way, 8.4v will only be read at a fully charged 4800mah?
If your set at 80 that may be the reason for the voltage readings.?
#30
Mines set at 100%