comeflywithme
04-10-2007, 08:20 AM
Hi
This is more a question for interest than anything else.
I presume that all LIPO chargers work the same in that they charge at 1C (or whatever you set it to) untill the pack has charged to full voltage (12.6V for 3S) and then fixes the voltage to reduce current down to set value (0.1C on mine).
Now the thing I noticed is that on some LIPO's this behaves very differently. For instance a FP1500 EVO20 after about 40 cycles reaches 12.6V very quickly (after about half capacity) and the reduces currently very slowly to still allow full charging but at a slower rate.
My FP2170 EVO20 with about 10 cycles on the other hand, reaches 12.6V after its about 85% fully charged and then reduces current much more rapidly.
Thinking back to my high school Physics - V=IR, this suggest that the resistance of the FP1500 LIPO builds up earlier but much slower that the FP2170.
What I'd be very interested in is what this means in real terms?. I havent noticed any major difference between the two LIPO's in terms of performance or endurance?. Is this kind of behavious a normal sign of LIPO ageing?
Looking forward to your replies
This is more a question for interest than anything else.
I presume that all LIPO chargers work the same in that they charge at 1C (or whatever you set it to) untill the pack has charged to full voltage (12.6V for 3S) and then fixes the voltage to reduce current down to set value (0.1C on mine).
Now the thing I noticed is that on some LIPO's this behaves very differently. For instance a FP1500 EVO20 after about 40 cycles reaches 12.6V very quickly (after about half capacity) and the reduces currently very slowly to still allow full charging but at a slower rate.
My FP2170 EVO20 with about 10 cycles on the other hand, reaches 12.6V after its about 85% fully charged and then reduces current much more rapidly.
Thinking back to my high school Physics - V=IR, this suggest that the resistance of the FP1500 LIPO builds up earlier but much slower that the FP2170.
What I'd be very interested in is what this means in real terms?. I havent noticed any major difference between the two LIPO's in terms of performance or endurance?. Is this kind of behavious a normal sign of LIPO ageing?
Looking forward to your replies