I know quite a few on here have purchased aftermarket chargers branded as Yx for their Mavics and such. I know this brand had issues a while back when they were supplied without any form of grounding, but I was wondering if anyone had issues whereby their batteries would refuse to charge?
I received one of these three port chargers earlier today, from Amazon, for use with my DJI FPV batteries but unfortunately I’m sending it straight back for a refund.
The issue is that when a battery is connected to anyone of the three available ports it will appear to start charging, but after a few seconds the battery will go into a fault condition indicating an overcharge situation.
Did I receive a lemon or have others had similar experiences with these chargers?
I did wonder whether it was because both the supplied charger and the optional hub has the three micro contacts in the charging plug(s), where as the YX thing only has the +ve and -ve primary contacts. Meaning the batteries would only charge if they detected a particular signal on one of these pins.
Before I pack it up to be dropped off at my local Amazon return point I’ll also check to see that on the off chance the polarities on the supplied leads hasn’t been reversed. YX chargers have quite a history of dodgy (non-existent) quality control.
I doubt DJI have changed things much and, whilst the M1P chargers and hub have multi-pin connectors, the inside of the charge hub only has two pins connected.
Yep, it turns out the YX charger cannot regulate itself when high current is required.
I charged one of my FPV batteries on the DJI charger up to the final balancing point. I then plugged the battery into the YX charger and it continued to complete the charging process. This is because the final balancing procedure is done at a constant voltage and low current.
Conclusion. The YX charger has piss poor regulation.
I purchased this same charger to charge my DJI FPV batteries (4) & it seems to work quite well even if the battery is down to 10-20% SOC it charges 3 at once no problem on mine, so it does look like you have a dodgy one there, the only reason I bought it was that I have happily charged my Mavic 2 Pro batteries for a year with the YX M2P equivalent model, thinking of purchasing the Mavic 3 version next but since at the present time I only have one battery, I will wait a while.
I wanted to discount the probability that I was doing something wrong, but it turns out that this particular charger is faulty. Maybe there’s been a bad batch? The charger uses three separate SMP’s for each channel, effectively three individual chargers in one box, all fed from a single 240VAC supply. So to have one channel fail could mean that one board is faulty, but to have all three boards exhibit the same problem could intimate that something has changed or gone wrong during the manufacturing process. This also means that the claim on the box that it was QC’d prior to being shipped is a complete lie.
I’ve chosen to receive a refund rather than a replacement as I don’t want to go through the same process on the off chance I receive a similarly defective product from the same batch. I’ll stick with the DJI hub, even though it only charges one battery at a time.
I ordered this one because of how quick the FPV goes through the battery & being able to charge 3 at once made a big difference, the hub even though it was handy & easy to setup was too slow for when I wanted to do multiple flights in one day.
For s#1! 5 and giggles I thought I’d open up the charger and look to see if I could spot anything obvious.
Flipping the PCB to look at the underside I noticed a number of tiny solder balls, some bridging some tracks. So much for the claimed “Quality Control”.
Once the balls were castrated from the PCB and the charger put back together the FPV batteries now charge as they should.
