think my zippy is dead

[Boaterguy]

:cursing::cursing:charged all 4 of my zippies up and discharging the first one with 12V 58watt lightbulbs after approx 45 minutes the lights went out, i was in the other room and didn't notice when, I just noticed there were no lights on and ran in there to unplug ASAP.
lipo is warm, cell volts are about 2, .5, 2, lipo is warm and puffed about 2 or 3mm, puffing is not an issue but I have it with me just in case
what should I do????
:cursing:starting to hate hobbyking a little more:cursing:

[Make-a-Wake]

If you feel the batt is fried and of no use now, fill up a bucket of water, add some salt, and place it in there for a couple days..........RIP

[Boaterguy]

is it recoverable and safe to run in a 6S2p setup? (it's a 2650 3S)
I just don't want to wait for more packs (or shell out more money for blue lipos)
I am NOT buying lipos from HK anymore, at least 2 of 5 dead packs from my shipment so far.
what I don't understand is 15 minutes before I went in the voltage was at 3.6/cell
lipo is mostly cool now

[Boaterguy]

voltage is climbing
2.5,.7/.8,2.6

[Doby]

Why hate Hobby King? They didn't overdischarge your LiPo...you did.

[Make-a-Wake]

How far past the 3.6v per cell did you run them................15 more minutes? 3.7v is completely dead, you may have over discharged them. I also dont recommend using light bulbs to discharge finicky/dangerous batts.

[Boaterguy]

if 3.7 is completely dead, why is the usual LVC 3-3.4V/cell?
with 58watts (8*7 watt 12V lightbulbs) i should be drawing 2.5 amps (2.54 continuous), with 2650 mah packs that should give me an hour of discharge time
i had 2.5, .5, 2.5V on the cells after 42 minutes and four seconds

[Make-a-Wake]

Were they new? If they were, they come in at a storage level of 3.85v per cell..............if thats the case, you wouldnt have an hour of discharge time simce they were only 30% charged.

Secondly.............LVC's are set so when the batt reaches that level UNDER LOAD it cuts out. If a batt hits 3.0v under load and LVC kicks in, it will then rebound to around 3.7-3.75 volts. 4.2 is fully charged per lipo cell and 3.7 is 100% depleted............some do not know this but its a fact.

[Boaterguy]

alright.
they came at about 3.8V and I charged them all to 4.2/cell
cells should have been at about 3.4/3.5V under a 2.5a at the time they cut out
middle cell won't generate any voltage now.

[Drax21]

Of all the batteries I have had from Turnigy -Zippy seem to be the worst. Normally just bad resistance though.

[Rumdog]

why were you discharging it with a light bulb? bored?

[skellyo]

what should I do????

Learn how to be more responsible with lipos. On top of that, don't blame retailers for your misuse of the products they sell.

Sent from my EVO 3D using tapatalk.

[siberianhusky]

Man you are your own worst enemy when it comes to rc boats!:doh:
Why wouldn't you use a charger to bring your batteries back down to storage levels or whatever?

[Boaterguy]

i was cycling them to break them in
my charger discharges very badly and discharges to 3V/cell, I was going for about 3.4 a cell and with the lightbulbs (used on some plane packs) i could discharge at 2.5 amps instead of .4/.5 that my charger can do
I honestly don't understand why it's my fault that the packs died after 42mins and 4 seconds at 2.5 amps, if it's 2650, that should be approx 75%, if discharging 75% of the capacity of a pack brings the cells down to 2.5V,.5V and 2.5V, then it's my fault

[Make-a-Wake]

Bottom line is that no-one, including the manufacturers suggests using light bulbs to alter Lipo voltage. Thats why high tech chargers are made..........if it discharges at 0.5a then it just takes 2+ hours. Maybe you should invest in a better charger to properly maintain your Lipo "investment"......................BTW you're not the first one that has had the first time user problems.............no biggie.

[LiPo Power]

You cant discharge your lipos just by connecting lightbulb to it and let it drain untill the light is out.
You just keeled your lipo....
You are right by beeing pist off at HobbyKing, they are morons but this battery was shot by the lightbulb.
Get new charger if the one you have is not capable of discharging lipos and you are back in business....

[LiPo Power]

Why hate HobbyKing?
Becouse they are morons, it is normal for some people to hate them.....






Why hate Hobby King? They didn't overdischarge your LiPo...you did.

[Boaterguy]

You cant discharge your lipos just by connecting lightbulb to it and let it drain untill the light is out.
You just keeled your lipo....
You are right by beeing pist off at HobbyKing, they are morons but this battery was shot by the lightbulb.
Get new charger if the one you have is not capable of discharging lipos and you are back in business....
i didn't let it go till the lights went out, I was timing it in 20 minute increments and I noticed (i was in the other room) that the lights were no longer on, so I ran in as fast as possible, suspecting a short.

[ENCORE MAN]

Ok guys, he doesn't get it or doesn't want to get it. Brydon, trash the darn lightbulbs. BG

[Doby]

Why hate HobbyKing?
Becouse they are morons, it is normal for some people to hate them.....

They didn't over dischrage his battery.... be mad at them for a controller not being replaced for 2 years, that makes sense...but for this...sorry, he did it to himself in this case.....not Hobby Kings fault.

[Boaterguy]

okay, i will ditch the lightbulbs, I understand I made an impulsive decision
can someone just help me understand why the voltage dropped so fast?
my theory is that the middle cell (the dead one) is bad, and was using power from the other two to try to charge itself, is this even close to right?

[Make-a-Wake]

Even if your theory was remotely in the realm of possibility.....................it can never happen, they are in series, not parallel.

[Boaterguy]

could it be the cell was dead and the other two had to produce the wattage with more amps thus killing them quicker?

[Make-a-Wake]

Just throw it in the bucket of saltwater and buy a new one....................and take proper care of it.

[Boaterguy]

two genace 40C 5000mah 3S packs on the way
after the saltwater can it be thrown in the trash or is it still hazardous waste?

[Gimp]

It can be thrown away after being fully discharged. Let it sit in the water for almost a week to be safe.

[Make-a-Wake]

After about 2 days..................wrap up in a bag and throw in your trash outside. Cut the bullets off to re-use for something later...........but ONLY cut one wire at a time.

[Boaterguy]

yeah i know that much about FE's, not much else but... (you don't have to agree with that)
bullets will be going on my build, went with 5.5's cause i'm too lazy to solder (and write because instead of cause)

[LiPo Power]

Woww Really Doby????

Boaterguy, I use my lipo charger to discharge my batteries. It is the function called ,,storage lipo,, and it does very good job.
Also the ballance of discharged lipo looks very good too after discharging.
All lipo chargers today do have this function, even if you get one for $16.00 from overseas...
Cheers
Robert









They didn't over dischrage his battery.... be mad at them for a controller not being replaced for 2 years, that makes sense...but for this...sorry, he did it to himself in this case.....not Hobby Kings fault.

[Boaterguy]

don't knowck the accucel, sure it sucks, but it works
i was doing discharge, instead of storage.
it's too bad chargers don't have like a 3- cycle mode so you can leave it going all day (on the weekend) while at work on the boat.