Reviving a LI ION battery??!
#1
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Reviving a LI ION battery??!
Hey all - I have heard that you can revive a LI-Ion battery that has been drained too far to charge on a regular LI charger, but hooking it up first to a NIcad charger to get it back to it's minimum charge and then finishing on a LI charger.
Can anyone give me specifics? It's a 2000ma battery. I was going to try .5amp until it reached 4v, then put it on the LI charger
Thanks
Tim
Can anyone give me specifics? It's a 2000ma battery. I was going to try .5amp until it reached 4v, then put it on the LI charger
Thanks
Tim
#2
Senior Member
RE: Reviving a LI ION battery??!
ORIGINAL: trpastor
Hey all - I have heard that you can revive a LI-Ion battery that has been drained too far to charge on a regular LI charger, but hooking it up first to a NIcad charger to get it back to it's minimum charge and then finishing on a LI charger.
Can anyone give me specifics? It's a 2000ma battery. I was going to try .5amp until it reached 4v, then put it on the LI charger
Thanks
Tim
Hey all - I have heard that you can revive a LI-Ion battery that has been drained too far to charge on a regular LI charger, but hooking it up first to a NIcad charger to get it back to it's minimum charge and then finishing on a LI charger.
Can anyone give me specifics? It's a 2000ma battery. I was going to try .5amp until it reached 4v, then put it on the LI charger
Thanks
Tim
#3
Senior Member
RE: Reviving a LI ION battery??!
I had a 3S Lipo airplane that got stuck in a tree for 2 weeks with the receiver turned on. It drained the Lipo completely when I recovered it. I read in some online help forum to put the 3S Lipo on a Nicad/NimH charger until the voltage reached the 10.5 volts minimum that the 3S Lipo/Li Ion charger will recognize and then finish it on a balance Lipo/Li Ion charger. You have to watch constantly the voltage going up(you need a voltmeter for this) when it is hooked up to the Nicad/NimH charger as it has no cut-off voltage and will overcharge and burn up the Lipo. I also charge my Lipo batteries outside in the cement driveway inside a clay flowerpot so as to be safe in case the Lipo is overcharged and catches fire. I successfully recovered/re-charged the lost Lipo and I have been using it for over a year now with NO PROBLEMS.........but you have to be checking constantly with the voltmeter as you recharge with the Nicad/NimH charger to prevent overcharging and burning up the lipo. 'Nuff said.
Thanks and God Bless, always
larry
Thanks and God Bless, always
larry
#5
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RE: Reviving a LI ION battery??!
I had a 2 cell receiver battery - lithium ion - that got left in a plane with the switch on. Lipo charger wouldn't charge it, so I put in on a Nimh charger and charged it at 1C for 10 minutes then switched to the lipo charger for a full balancing charge. Has worked perfectly ever since.
For voltage specifics we need to know more about the battery - #cells, etc.
I charge my lipo's at 1C all the time, so that's what I charged it at on the Nimh charger (in your case, 2amps). 10 minutes would bring it up to 10% capacity. You could try getting to a specific minimum voltage, but I personally would just go in 10 minute increments on a charger at 1C (2amps) and every 10 minutes try with the lipo charger and see if it takes it.
For voltage specifics we need to know more about the battery - #cells, etc.
I charge my lipo's at 1C all the time, so that's what I charged it at on the Nimh charger (in your case, 2amps). 10 minutes would bring it up to 10% capacity. You could try getting to a specific minimum voltage, but I personally would just go in 10 minute increments on a charger at 1C (2amps) and every 10 minutes try with the lipo charger and see if it takes it.