All my batteries fried

[AerialViewSolutions]

I tried being cheap and used a off brand charger for my mavic batteries. It had a bunch of good reviews on Amazon. Well now all of my batteries are damaged and showing 2 flashing lights for the cells being friend. I'd recommend you all stay away from this charger. I'll post a pic of the listing. I've tried completely discharging and recharging them with no luck. I also contacted DJI and they refused to help me ( I didn't tell them about the off brand charger). What sucks is a couple of them are only like 8 months old with 11 charges on them!

 

[AerialViewSolutions]

 

[Just_nick]

Have you tried flashing the firmware on the batteries?

 

[Former Member]

Have you tried flashing the firmware on the batteries?

That might help. I dont think they are fried.

 

[AerialViewSolutions]

Have you tried flashing the firmware on the batteries?

I have not! Care to elaborate a bit more? Would be appreciated. I'd love to not have to drop a few hundred on new batteries!

 

[Former Member]

Check out this video:

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[AerialViewSolutions]

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The error I'm getting from my battery is a single led flashing twice consecutively. I'll look into the DJI assistant tomorrow like the video showed though. Worth a shot!

 

[Former Member]

The error I'm getting from my battery is a single led flashing twice consecutively. I'll look into the DJI assistant tomorrow like the video showed though. Worth a shot!

Which led is flashing? Wait until the morning then try charging each one on your OEM charger.

Just FYI, Fstop makes some really good equipment, you might have gotten a bad one. I have bought tons of stuff from them and they are good people.

 

[deanneat]

this reported 2 flashes per second on the 2nd LED - have a read

Battery error - cell broken

 

[RayOZ]

I never really looked at the battery cells in detail, but there's some voltage difference between the 3 cells. I wonder if discharging and charging with the OEM charger a few times might stablise them? Was the 3rd party charger overcharging the batteries?

 

[Former Member]

I never really looked at the battery cells in detail, but there's some voltage difference between the 3 cells. I wonder if discharging and charging with the OEM charger a few times might stablise them? Was the 3rd party charger overcharging the batteries?

Good point. OP you should write down the voltages on each battery, and then charge them with the OEM charger then see if it balances them batter. As @RayOZ said, theres quite a difference in the individual cell voltages, as if they are not balanced.

 

[AerialViewSolutions]

this reported 2 flashes per second on the 2nd LED - have a read

Battery error - cell broken

Great! So it wasn't the charger. It was poor DJI manufacturing. I don't have the experience to tear my batteries apart and correct this. Anyone ever used the aftermarket mavic batteries? Maybe theyre manufactured better?

 

[AerialViewSolutions]

Good point. OP you should write down the voltages on each battery, and then charge them with the OEM charger then see if it balances them batter. As @RayOZ said, theres quite a difference in the individual cell voltages, as if they are not balanced.

I've already tried the discharge and recharge once. I still got the double flash after but didn't put them into the mavic to check the voltages. I'll have to see if the one recharge helps. It's also really hard to discharge the batteries completely.

 

[Former Member]

Great! So it wasn't the charger. It was poor DJI manufacturing. I don't have the experience to tear my batteries apart and correct this. Anyone ever used the aftermarket mavic batteries? Maybe theyre manufactured better?

I never use aftermarket props or batteries. Recipe for disaster.

 

[Former Member]

I've already tried the discharge and recharge once. I still got the double flash after but didn't put them into the mavic to check the voltages. I'll have to see if the one recharge helps. It's also really hard to discharge the batteries completely.

Did you try recharging using the OEM charger?

 

[AerialViewSolutions]

Did you try recharging using the OEM charger?

Yes. After I found this problem I refuse to use the Fstop charger.

 

[Former Member]

Yes. After I found this problem I refuse to use the Fstop charger.

What method did you use to completely discharge them?

 

[AerialViewSolutions]

What method did you use to completely discharge them?

Stuck it in the drone and left it until it died... ‍ Is there a better way? Lol

 

[Former Member]

Stuck it in the drone and left it until it died... ‍ Is there a better way? Lol

Thats the best way as long as it doesnt drop below 10%.

 

[AeroMirage]

I use only OEM Props, batteries and chargers.