Ep 4200 Has blown up in my face

[big air]

Originally Posted by ben

where were they bought from?

Dont really want to say where they are from because i dont think the problem lies with the matcher, And don't want to start causing problems for them and i dont know if would be in the best interest for the sport to say so, Im defo going lipo now and going to charge them in a metal safe

[ianplimmer]

yeah he's ok thank god but how much longer can we all keep escaping a serious accident

[ashleyb4]

There are 3 versions of EP mk1 mk2 and mk3 mk3 has never been lega mk1 and mk2 have been do you know which version it is.

A

[MK999]

Hoping we can put this down to a freak accident/manufacturing fault in that single batch, but I am starting to get quite worried about the battery situation in general, personally i use GP3700's partly due to budget, but mostly because they're more reliable and can take a lot more abuse (like me being a numpty with a charger and using the wrong profile or something) but the current safety situation on the high performance batteries is getting out of hand.

[bigred5765]

thats the first i heard of ep cells going bang i can only say
short circuit can see them going bang like you explained without any reason

[gramey]

I bought some of the EP 4200 mk II cells assembled for me by the seller and I was discharging and equalising them before charging them for the very first time. A cell in one of the packs exploded whilst I was discharging it, fortunately on a hard coffee table in my living room and the shrapnel was stopped by my armchair.
I returned the pack to the supplier and he replaced it no questions asked and I didn't have any trouble with any of them after that but it does make you think. I'm running nitro now but I never charged at more than 5 amps and like I said these hadn't even had one charge in them, I was discharging at 20 amps to 5.4 volts.

[ashleyb4]

I have stormforce GP4300 I admit i dont discharge and equlise them as much as i should but ive never had any of them blow up on me there over 12 months old now.

A

[xx4-nutter]

i may store mine in the shed now.....

[Northy]

Mmmmmm, get ready for 'the talk' again tomorrow guys......

G

[Lee]

Is that the the "enter stu evans" talk?

[Richard Lowe]

Originally Posted by gramey

I bought some of the EP 4200 mk II cells assembled for me by the seller and I was discharging and equalising them before charging them for the very first time...I was discharging at 20 amps to 5.4 volts.

You don't discharge cells when new, they are already flat and equalised.

I don't know how it exploded without you putting any charge in it first, there shouldn't be any energy in the cell to explode

[Chris Green]

Ouch, this is bad news! glad you are ok.

I'm gonna start wearing safety goggles when I'm racing from now on!

[DaveG28]

TBH, I can't believe the insurers haven't got stroppy about this yet, I mean at this rate someone WILL get hurt, its just a matter of time!

Is all this stuff covered on house insurance by the way whn your at home, eg if my LIPO goes up would I be covered!?

[showtime]

right i'm just about to equalise my IB's

wish me luck

[telboy]

I have heard of cells going pop while they are just sat doing nothing before. I may leave mine elsewhere from now on, imagine if something happened while you were asleep? Not good.

Luckily all my IB's are going soon to make way for new cells.

[gramey]

Originally Posted by Richard Lowe

You don't discharge cells when new, they are already flat and equalised.

I don't know how it exploded without you putting any charge in it first, there shouldn't be any energy in the cell to explode

Well you learn something new everyday, not withstanding that the discharger has an auto cut off, so if there was anything in them it wouldn't have taken them too low anyway. I was just surprised this happened with brand new cells.

[GRIFF55]

Luckily all my IB's are going soon to make way for new cells.[/quote]

These were EP's, still it's made me v nervous with all cells!

[Tom3012]

glad no one was hurt!!... my IB's are under my bed at the moment, think i need to buy an air-raid shelter for them!!

anyone want to buy some IB 4200

[big air]

Originally Posted by bigred5765

thats the first i heard of ep cells going bang i can only say
short circuit can see them going bang like you explained without any reason

they came in contact with nothing, they where sat on the top of my all plastic tool box on my pit table 3 feet away from anything else, they where the only thing on the top of my box and have been there untouched for a few days, like i say they just went bang

[super__dan]

Originally Posted by Richard Lowe

You don't discharge cells when new, they are already flat and equalised.

I don't agree with you there dude, every pack of cells I've ever owned I've equalised off as a matter of course. Most recent cells had odd cells virtually flat but not every one of them. I don't believe it's common for manufacturers to equalise cells off after their final match.