Trackpowers

tiny tom · #1 27-10-2009

Can anyone tell me why my 3600mah 30c stick battery are not holding there charge because my aren't?
They are charged at 4.5 to 5 amp and always balanced when chargering, I have had 3 balance go down on me but flighttech have always changed them.
Can anyone help?

bigred5765 · #2 27-10-2009

need more info, what do you mean not holding there charge, how long can you run with them what are you running motor speedo etc and 4.5 / 5 amps is slightly high charge rate is 1c 3600x1c=3.6 amps

tiny tom · #3 27-10-2009

Well I charge them on 2 cell on the trackpower charger, and running them in a cat 3 mins you could see the power drop off and car not going as fast. And sometimes they stop because they hit the lipo cut off at 6 volts

Big G · #4 27-10-2009

how long are they being charged for?

tiny tom · #5 27-10-2009

35-45 mins

bigred5765 · #6 27-10-2009

what motor? speedo?? 3mins does sound a little to quick to be at cut out voltage

tiny tom · #7 27-10-2009

Brushlless 6.5 and 5.5 and the volt cut off is 6v

bigred5765 · #8 27-10-2009

does sound like a duff lipo, but can you get hold of another lipo to test of someone else,just to make sure,

Big G · #9 27-10-2009

I was always under the impression they should take about an hour to charge at 1C. I guess it's cutting off when it's peaked?

my charger charges the pack quite quickly to 8.4 volts and then the current comes down slowly while the pack stays at 8.4 although during this come down it probably puts another 800-1000mah into them

Body Paint · #10 27-10-2009

Sounds like they are worn out, they don't last forever you know. My oldest pack of 3600's have just started doing exactly what you explain.

Mine are way over 300 charges old so I am in no way disappointed with them.

mark christopher · #11 27-10-2009

Quote:

Originally Posted by tiny tom

Can anyone tell me why my 3600mah 30c stick battery are not holding there charge because my aren't?
They are charged at 4.5 to 5 amp and always balanced when chargering, I have had 3 balance go down on me but flighttech have always changed them.
Can anyone help?

how old are they? how long have you had them? were they new?
and its Trakpower with no C

bigred5765 · #12 27-10-2009

Quote:

Originally Posted by mark christopher

how old are they? how long have you had them? were they new?
and its Trakpower with no C

you mean 1c mark lmao

sorry ill get my coat

mark christopher · #13 27-10-2009

Quote:

Originally Posted by bigred5765

you mean 1c mark lmao

sorry ill get my coat

hmm kind of reads not right with his problem

lol

Marvin · #14 27-10-2009

The original Trakpowers were actually rated for 2C charging, just they didn't really advertise it.

4.5-5A is around 1.4C, so is fine.

Colinevan · #15 28-10-2009

Tell you what i noticed with the tp's

They orignally advertised as the batts are good for 1000's of charges. they dont quote that anymore lol.

Col.

mark christopher · #16 28-10-2009

Quote:

Originally Posted by Marvin

The original Trakpowers were actually rated for 2C charging, just they didn't really advertise it.

4.5-5A is around 1.4C, so is fine.

its true they are rated at 2c but doing so will reduce life span, so in this case, maybe its not ok, alo the brca guide line is 1c max.

mark christopher · #17 28-10-2009

Quote:

Originally Posted by Colinevan

Tell you what i noticed with the tp's

They orignally advertised as the batts are good for 1000's of charges. they dont quote that anymore lol.

Col.

the claim was allways 100+ for racing, and 200+ for practice, its still on the web site.......... One of my packs is near 200 now.

Marvin · #18 28-10-2009

The BRCA are hardly at the forefront of technology with the '1C rule' then. At 2C, lifetime will be reduced, though not by that much.

I use (in 1/8) Hyperion batteries that are rated for 5C (and I've charged them at 3-4), and reports suggest that lifetime is not really reduced unless regularly charged at over 3C.

Trakpower did always say the 100 cycles in race conditions, 200+ in practice. Not 1000.

c0sie · #19 28-10-2009

Quote:

Originally Posted by Marvin

The BRCA are hardly at the forefront of technology with the '1C rule' then. At 2C, lifetime will be reduced, though not by that much.

I use (in 1/8) Hyperion batteries that are rated for 5C (and I've charged them at 3-4), and reports suggest that lifetime is not really reduced unless regularly charged at over 3C.

Trakpower did always say the 100 cycles in race conditions, 200+ in practice. Not 1000.

The "1C rule" is mearly a suggestion from the Electric Board. It isnt a rule.

Marvin · #20 28-10-2009

Sorry, from Mark Christopher's post I gathered that it's a rule. I stand corrected!