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› Junsi iCharger 4010Duo Discharging
06-06-2014 05:41 PM  3 years agoPost 1
wjvail

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Meridian, Mississippi

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Hey all. Thought I'd share. For as long as I've been in this hobby (40+ years) testing batteries has been a requirement and often a challenge. As batteries get larger and larger, it gets harder and harder to discharge them. It's tough to put a big battery back into storage if you don't use it at the field. Most chargers are limited to something around 50 to 80 watts discharge. That a really easy to reach limit. Even the iCharger 4010Duo is limited to 160 watts without help. But you knew all this.

The regenerative mode of the Junsi iCharger 4010Duo really helps with this. I'm really excited about this feature of this charger and I felt like sharing.

Here is a little YouTube video of how it works. Using this feature I'm able to quickly test a battery. If it's still charged after a trip to the field I can bring the cells back to 3.85 volts in just a few minutes. In this video I'm able to test the health of a 5S, 4000mAh battery in under 7 minutes. Nice!

Before the question get asked, no I don't work Junsi. I bought my charge at ProgressiveRC (good folks), (and I don't work for them either). http://www.progressiverc.com/icharger-4010duo.html

Thoughts and comments welcome.

Cheers,

Bill

Watch at YouTube

"Well, Nothing bad can happen now."

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06-10-2014 09:53 PM  3 years agoPost 2
coolice

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Northamptonshire, England

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Hey.

Regenerative discharge to channel is a good feature of the iCharger DUO series chargers. While they are quite capable dischargers on their own, they have been known to fail during high discharges and you can go to even higher discharge rates with external resistors or a load.

I quite like this idea from Tungsten2k;

http://www.rcgroups.com/forums/show...95#post27844007

Using a modified hair dryer you have a nice discharge load that also keeps itself cool with the inbuilt fan.
I build a lot of PSU's and have a resistor setup of 5x 5ohm metal cased resistors for load testing and have built my version of the above hair dryer load (can be seen in the above thread) which I use for cross channel regenerative discharging saving the charger from having to dissipate the excess volts.

Here is a good spread sheet made by RedOctobyr to work out the resistors needed for various power requirements;

http://www.rcgroups.com/forums/show...&postcount=2294
.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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