Who charging 20+ amps or more now??
04-02-2013, 11:18 AM
#16
EAM - After a race in say 17.5 TC. Do you further discharge the pack before charging or just charge it back up?
04-02-2013, 12:47 PM
#19
Most of my batteries will do 5 c but i dont charge them more than 10amps. Batteries
Might be rated higher but its still considered generally unsafe.
Tx/rx packs i charge at 1c always.
Never seen 1c rules enforced. People are usually too busy running the race to care about that.
Might be rated higher but its still considered generally unsafe.
Tx/rx packs i charge at 1c always.
Never seen 1c rules enforced. People are usually too busy running the race to care about that.
04-02-2013, 01:28 PM
#21
04-02-2013, 07:08 PM
#24
6 amps - Now 20 amps - went from 47.3 IR to 6.1 IR on the first charge!
How old and what brand lipo was it?
Venom 2cell lipo 60C - 2 1/2 years old.
What are you using to measure the IR drop (Turbo 30, etc)?
Measuring IR with a new Track Power VR-1.
Its measures IR throughtout the discharge cycle.
I think the higher charge rate puts light heat naturally into the cell waking them up on the first charge and lowering the IR right away.
The lipos are not hot just slightly above room temperature.
One C charge really does nothing for IR and would not be good for competition.....
04-02-2013, 07:57 PM
#25
At club level, with no temp Check, then a lower IR with hotter cells is preferable, but the risk of fire is higher.... I store at 7.70 volt per pack as per instruction, and I try to always End up with a higher voltage than 7.6volts after my runs....
04-02-2013, 08:27 PM
#26
Usual club charges are 14 amps , I only bring my 208 icharger to the races. I had an old turnigy 4,000 2s pack that was destin for the trash. I tried to charge it at 70amps (outside on the concrete) with the 4010, but it just melted solder joints inside the pack.
Questions on long term storage, my 1 cells won't see use for awhile.
. Is freezing them a good option at storage voltage (makes sense in my head)
Questions on long term storage, my 1 cells won't see use for awhile.
. Is freezing them a good option at storage voltage (makes sense in my head)
04-02-2013, 08:42 PM
#27
The ONLY thing that charging at higher amps will do is: Charge the battery faster, cut down on the life of the pack (from 300 cycles to 200 cycles maybe all speculation), and it will warm the pack internally which will decrease IR and increase voltage. But with all the big races checking battery temp it will not help as it wont pass tech.
The heat is the only reason it increases the voltage and lowers IR. If you let the pack cool to room temp and check it it will be the same as if you charged it at 5 amps. I have yet to see a charger that has any special voodoo built in that will charge and make a battery faster without using heat.
Ive been charging at 40 amps since December with the ICharger Duo 4010 came out. I raced every week all the way up till the birds. I only keep two packs to my name at a time. I practice and race on those two packs every week in TC. Those packs are still good today as they were new in December. The 40 amps thus far has not shown any ill effects at all. Generally when I go to the track its 4-5 charges per pack per day. There were some 3 day races in there too.
The pack I won the birds with was charged at 40 amps every single charge. I used it in both 17.5 and 13.5 TC all week in every practice and every race. Then I sent it to Josh Cyrul and he did the same with it in Modified and 13.5 sedan which he won both classes. That battery was put through hell and still cycles the same as it did when it was new a week before the birds.
The key to keeping batteries fresh is USING THEM! And making sure they dont sit with a full charge or zero charge in them. Not being used is a Lipo's worst enemy I have found.
EA
The heat is the only reason it increases the voltage and lowers IR. If you let the pack cool to room temp and check it it will be the same as if you charged it at 5 amps. I have yet to see a charger that has any special voodoo built in that will charge and make a battery faster without using heat.
Ive been charging at 40 amps since December with the ICharger Duo 4010 came out. I raced every week all the way up till the birds. I only keep two packs to my name at a time. I practice and race on those two packs every week in TC. Those packs are still good today as they were new in December. The 40 amps thus far has not shown any ill effects at all. Generally when I go to the track its 4-5 charges per pack per day. There were some 3 day races in there too.
The pack I won the birds with was charged at 40 amps every single charge. I used it in both 17.5 and 13.5 TC all week in every practice and every race. Then I sent it to Josh Cyrul and he did the same with it in Modified and 13.5 sedan which he won both classes. That battery was put through hell and still cycles the same as it did when it was new a week before the birds.
The key to keeping batteries fresh is USING THEM! And making sure they dont sit with a full charge or zero charge in them. Not being used is a Lipo's worst enemy I have found.
EA
04-02-2013, 08:49 PM
#28
The ONLY thing that charging at higher amps will do is: Charge the battery faster, cut down on the life of the pack (from 300 cycles to 200 cycles maybe all speculation), and it will warm the pack internally which will decrease IR and increase voltage. But with all the big races checking battery temp it will not help as it wont pass tech.
The heat is the only reason it increases the voltage and lowers IR. If you let the pack cool to room temp and check it it will be the same as if you charged it at 5 amps. I have yet to see a charger that has any special voodoo built in that will charge and make a battery faster without using heat.
Ive been charging at 40 amps since December with the ICharger Duo 4010 came out. I raced every week all the way up till the birds. I only keep two packs to my name at a time. I practice and race on those two packs every week in TC. Those packs are still good today as they were new in December. The 40 amps thus far has not shown any ill effects at all. Generally when I go to the track its 4-5 charges per pack per day. There were some 3 day races in there too.
The pack I won the birds with was charged at 40 amps every single charge. I used it in both 17.5 and 13.5 TC all week in every practice and every race. Then I sent it to Josh Cyrul and he did the same with it in Modified and 13.5 sedan which he won both classes. That battery was put through hell and still cycles the same as it did when it was new a week before the birds.
The key to keeping batteries fresh is USING THEM! And making sure they dont sit with a full charge or zero charge in them. Not being used is a Lipo's worst enemy I have found.
EA
The heat is the only reason it increases the voltage and lowers IR. If you let the pack cool to room temp and check it it will be the same as if you charged it at 5 amps. I have yet to see a charger that has any special voodoo built in that will charge and make a battery faster without using heat.
Ive been charging at 40 amps since December with the ICharger Duo 4010 came out. I raced every week all the way up till the birds. I only keep two packs to my name at a time. I practice and race on those two packs every week in TC. Those packs are still good today as they were new in December. The 40 amps thus far has not shown any ill effects at all. Generally when I go to the track its 4-5 charges per pack per day. There were some 3 day races in there too.
The pack I won the birds with was charged at 40 amps every single charge. I used it in both 17.5 and 13.5 TC all week in every practice and every race. Then I sent it to Josh Cyrul and he did the same with it in Modified and 13.5 sedan which he won both classes. That battery was put through hell and still cycles the same as it did when it was new a week before the birds.
The key to keeping batteries fresh is USING THEM! And making sure they dont sit with a full charge or zero charge in them. Not being used is a Lipo's worst enemy I have found.
EA
04-02-2013, 08:51 PM
#29
04-02-2013, 08:55 PM
#30
