Discharging at 30-40 Amps - Stand alone discharger
 

Saw someone with a standalone discharger at the track today. Was about 1/2 he size of an Icharger and could discharge at 40 amps. Is anyone here using this? Are they safe? And is there any benefit versus using a slower discharge Via an icharger or any other 30-40 amp charger? Btw - I'm aware of the advantages of rapid discharge/charge especially with stock racing but am asking about the advantage of using a small stand alone unit vs the charger. Thx!!

You want it charger controlled - preferably with an icharger.

It's all an effort to get the battery hot. Discharge at 40 amps, then charge it up at 70 amps. Get it's super hot, and then the IR drops.

Re
 

It discharges to pre-programmed 3.5. Tiny unit with a fan. Not charger controlled. Is this dangerous? why use a separate stand alone unit?

Because there are few chargers besides the iCharger series that can discharge at that rate. Take a look at chargers available. Most are in the 5A range for discharge.

That may have been something called a "Dumper": https://www.superiorhobbies.com/stor...ery+Discharger

3.5 is meh. You really want to push it to 3.25 or so.

Yes, It look almost exactly like this, but 1/2 the size and square. Is this safe?

Also, What can the icharger safely discharge at without a separate unit, and does it even do anything to performance?

Does the 40 amp discharge really do a lot, versus a slower discharge power wise? And at what cost to the battery?

Read my post. The great things about the icharger are it's charging and discharging algorithms. The programming itself is far superior than anything out there.

That said, as I said before, the goal is to get the battery hot. Usually to 120-130 degrees. This causes IR to drop.

Thanks Socket. My problem is I'm using a Turnigy Reaktor 30amp 1000W charger. It is a rebranded version of the older, Icharger 306B. Don't know if the algorithms in the older Icharger are applicable. I'm wondering if I should buy this separate unit with a fan, adjustable discharge voltage/amperage, or purchase a separate discharger resistor (or do anything but just discharge to rebalance cells).

Can't you just warm the battery with something like a modified tire warmer or the like. Why do it with a crazy discharge rate? Am I missing something?

You are. I have noticed, people seem to always ask me questions about my posts, but completely fail to read them.

The algorithm of the icharger is superior to any other brand out there. This is why you use it for discharge and charging.
It's ability to balance a battery is unmatched.

Using other brands or non icharger models is a good method to puff and explode batteries.

Getting the battery hot with the icharger is a method to get it hot internally. Any other method, like a warmer wrapped around it is a great method to puff and explode a battery.

That's a lot of energy in the form of heat to dissipate in a tiny box that size.

Are you sure they didn't have a large car battery (or something of that sort) attached, in which the energy was regenerated and transfered to the car batt? I beleive that is one way the icharger allows larger discharge currents.

People have modified the Integy reactor 30 to work with lipo appropriate voltages.

Details are here: http://www.rctech.net/forum/radio-el...r-2s-lipo.html

http://i1191.photobucket.com/albums/...psa78a0138.jpg

I have the 406Duo but have never used like you say. But still don't understand why external heating would destroy a battery over rapid discharge.

Because ROAR banned battery warmers.