My luck gets worste...
 

My luck just sucks..

just ran my truck, came back to throw the batt on the charger, one cell is at 2.86v.... someone tell me i didnt kill it

the pack is a zippy 5s 4000mah pack, someone tell me that they have gone further and survived :cry:

all the cells are at 3.65v now.

am i cursed?

1. Original 8xl-fried
2. 2 spur gears stripped
3. slipper nut wont stay on
4. lost the front center drive cup and dovgbone
5. lost my 16t pinion in the grass
6. this...


:neutral::neutral::neutral::neutral:

You need to buy a good set of hex drivers, and a bottle of thread lock...

What charger and balancer do you have? I would charge the battery slowly, like 1.5amps and balance it at the same time. The go easy on the next few runs and do not drain it all the way. If it did not puff it should be fine...

NO.. it not just you!! I lost tons of money when that happened to both of my PQ 30C lipo's dropped too.. I feel your pain BB..

Sorry for your loss.

i do, i have t-handles..
and the pack is on at 1.6a already
i loctited EVERYTHING... thiis truck is cused..

charger is imax b5 charger/balancer

did it blow up? hope not. how the heck did it happen?

nope, i ran it down, then threw it on the charger and almost soiled myself when i saw 2.86 v

i just checked it all the cells are holding 3.9v

hmmm thats weird, if it balanced out and is not puffy, then i think you will be ok

*sigh of relief"

Notice he said "I think". Nothing is certain; only time will tell. I would do a couple gently cycles keeping an eye on any imbalance before going balls to the wall again...

yea.. ill probably drive around my basement tomorow since it is raining cats dogs and turkeys. lol

did you do as sugested and only run the lipo %50 down the first 5-10 charges to "break it in" i always have done this. I have only lost one pack and it was my 1/18 scale maxmaps pack so go figure.

yes, did do break in.

Ugh... That's why I can't bear to buy expensive lipos. If I killed one I couldn't get over it.

I'd do as said and just run it. I've overdischarged a few and they ended up being ok. Just don't make it a habit. You may lose some life, but eh, it happens.

2.86v is fine on its own, I think the specs say don't take then under 2.75vpc.

That said, it probably did drop below 2.75 if you were running it in its current state, and gave it a bit of WOT.

If its not puffy don't stress too hard. I haven't personally had a lot of experience with Zippy packs, but my brother has about 10 of them and most of them stay all within 0.1V, a few packs have a single cell that can strays out up to 0.5-1V though.

Crank up your LVC to 3.2 or 3.3 or something should help keep a a bit of a safety margin too.

i just checked the pack, all cell held voltage over night, all at 3.87-the cell in question was at 3.86, so im happy :D

give it a week and a few cycles. that will surely tell you the outcome. if it still works after that, sick, if not then bad luck, and keep the good cells to replace another dud or something.
ryan -i should get my zippy 4800 pack in the next few weeks, does the lipo cutoff work or not?!

lipo cutoff on the esc was working

the cut-off measures total voltage not individual cell voltage so it was still above cutoff but one cell was below 3.0v (i like 3.2v just for this reason) So with a 5s you proly had it at 15.0v correct? I would at least set is to 16.0v to allow each cell more head room.

Sorry to hear about your bad luck. At least the battery situation is looking up. What truck is this in? I was wondering if you flipped the tranny??? Because if you flipped the tranny without flipping the diffs and motor direction it would want to loosen up the slipper nut. Check the way your spur is spinning. Lefty loosie righty tighty! :yes:

i had the wrong spur gear on it, the spring was riding on the spur itself, so it spun the nut off when it slipped.. putting the dual plate slipper back on instead of single remedied this


Nick, my cutoff was at 15.6

yeah that for me is still a little low. Especially on the cheaper packs that dont to seem to hold a balance as well.

ill be sure to bump it up when i get the MMM :D

yeah just figure 3.2v per cell. Think of it this way.... Better safe than sorry. Besides the run time you will loose by doing it will be very very minimal

ah, i also touched up the paint on the 8xl, painted the part where it had been ground :D looks nice

this has got to win the dumbass award
http://www.foxnews.com/story/0,2933,404701,00.html

wow that kid is stupid. how the hell he even get a hold of it in the first place though. I mean come on it is liquid nitrogen, there had to be people at the convention watching the stuff.

I think you're probably fine. I've been lower than that and recovered without any long term issues that I could see.

BTW, holding voltage is no indication as to the integrity of the pack. You need to discharge them and see if the cell that went low discharges faster than the others.


J.