Need advice for a charger problem

Hey guys, I'm having a bit of trouble concerning my charger and I wasn't sure where to post about it so I chose the section I thought most relevant. I recently upgraded my entire setup and with it, I bought a Nightcore i2 Intellicharger (2016 model) to replace my terrible Universal Li-Ion Charger (rated at a pitiful 350-450 mAh). The Nitecore worked exceptionally well for all of 5 days and today, it started giving me trouble. I got up at about 5:30 AM to charge my batteries before work, knowing I would be up in an hour to monitor them and they were low enough to leave unattended. I got the first battery in Slot A just fine but fumbling in a sleepy stupor in the darkness of my living room, I noticed I accidentally inserted the second battery into Slot B in reverse. I didn't think much of it, removed it and oriented it correctly and went back to bed. When I woke up, all the LEDs over both bays were blinking and neither of my batteries had charged a bit. Skip ahead to when I get out of work and after messing around a little bit, it turns out that only Slot B will no longer charge and if I pair it with another battery, neither slot will work. Is there anything I can do to fix this or am I doomed to charge one battery at a time at 1A?

TLDR; I may have shorted a slot in my Nitecore i2 by accident since only one slot works and with only one battery at a time. Am I screwed or can I fix this?

Thanks in advance for any response!

I did this once only fix I found was to replace the charger

how bad does it smell??
If it smells a little bad you may have just burned a circuit board trace and it melted like a fuse.
I have recovered stuff for friends that have done this.
Sometimes other solder joints may have just unfused too.

Otherwise, there may be a diode or a fuse on the board to prevent BIGGER problems if battery is reverse inserted.
If you have some electronics acumen, you can attempt to recover that bay by component inspection.

Otherwise be safe and just chuck it.

I thought they had reverse polarity protection. I have a D-4 Intellicharger and have done the same thing, all mine did was blink an error for that slot until I turned it around.

Markw4mms said:

I thought they had reverse polarity protection. I have a D-4 Intellicharger and have done the same thing, all mine did was blink an error for that slot until I turned it around.

Click to expand...

The i2 has the same protection. OP need to get it replaced. Something is clearly not working as intended.


Sent from my iPhone using Tapatalk

Says in the manual that it has reverse polarity protection so it's definitely defective.

My warranty for the charger isn't up yet, so I may grab a new one. I'm not sure how dramatically charging a single INR at 1A for every cycle will affect it's life, but it bums me out enough to want it replaced. It doesn't smell at all and when I woke up and saw it behaving abnormally, there was no other sign of an error other than the fact that the error lights were blinking. I only shorted it very quickly (though I know it's still enough to count) before placing the battery in correctly, so I was a little baffled to learn that it actually did short my charger bay. I also thought, based on the box and manual, that this device had true short protection but it probably is defective after all. I think I'll either get an Xtar or get this thing replaced. Thanks for all the replies, everyone!

I did the same thing with my I2 and it still works fine a year later, so I'd say the charger popped. Return it.

I have a 4 or so year old I2 that sometimes doesn't charge batteries on either slot, fully. When I put both on my D2 one battery will be close to a full charge & the other will be pretty much empty.

Is this problem fixable? Or is it just time to trash it?