julian.paton

Hi guys

i have two power cell traxxas 8.4v 3000map nimh and i wont to cycle them.

discharge at what amp?

discharge down to what voltage?

can i cycle them i series?

i have a turnigy accucell-6 charger.

thanks

TheWoodCrafter

My Feedback: (1)

Your charger can't discharge fast enough to damage your battery.
That said try discharging at the max.
Discharge down to 1.0V

I would discharge in parallel.
Your charger doesn't have the output to charge them in series in a reasonable length of time.

julian.paton

i charge them in series they are 7 cell packs it dose 1-15.
the charger will put out a max of 5amp when charging.

so you would discharge them down to 1v

guver

My Feedback: (325)

1 volt / cell, that is 14 volts total.

julian.paton

haha

right i get it

do you no how hot a brushless motor i a emaxx should get mines geting quite hot

thanks

guver

My Feedback: (325)

castle motor ? I think 200 deg F max.

julian.paton

yer its a castle motor 

thanks

Goldenduff

think as a rule of thiumb (literally) you should be able to place a finger/thumb on motor for at least 4secs before you have to remove- personally I dont let my motors get anywhere near as hot.

julian.paton

 how hot should batteries get mine are all most to hot to touch

Goldenduff

Definitely too hot, you are reducing their life span. I think at worst they should be warm, subjective I know but near too hot to handle is way too hot in my mind

guver

My Feedback: (325)

Lipos should really be kept below 140 deg F

120 is a long life span , 150 is a shorter life span. 200+ causes damage with each cycle.

julian.paton

they are nimh bateries. they are all most to hot to touch after running.
when i first got it, the run time was 30mins now only about 15mins if that. i have runned the car about 23 + or  -.

guver

My Feedback: (325)

Oh, sorry NI type cells are the same. Maybe a touch hotter is ok. Ten degrees or so.

julian.paton

do you no any ways of cooling them down.

guver

My Feedback: (325)

Yes, reduce the current.

eddieC

My Feedback: (2)

I would cycle and charge the packs separately. If you have a decent VOM, you could test each cell using push-pins in the alligator clips. Old-skool. [8D]