Batteries charging error

[Mohammad Goli]

We have the Starling Max 2, and the Sentinel drones from ModalAI. However, we’ve been experiencing significant issues with the batteries of Starling Max 2. Initially, 3 batteries failed, so I ordered 4 new sets. Unfortunately, two of these new batteries are no longer charging and display either a short error or a low voltage error on our Dynamite Prophet Sport Quad charger (Picture attached).
Here’s how we typically operate the drone:
• When using batteries: We connect both batteries simultaneously to the Starling terminals.
• When using the wall charger: We use a jumper cable to short one terminal and connect the wall charger to the other terminal.
Could you please assist with troubleshooting this issue? Should I return the batteries or the drone for diagnostics?
I’d appreciate your guidance.

Thanks,

[James Strawson]

Are the failed batteries the white 3000mah Gaoneng packs or the black 4000mah Upgrade Energy Packs?

[Dobry Kolacz]

That is a concerning failure rate.

In production we use these batteries on a daily basis with no issues. The only time we see failures is when the battery has seen a lot of use and eventually the power leads can break off from their soldered connection to the tabs on the cells. This happens when too much force is applied to the battery power cable typically when unplugging the battery from the drone.

It is imperative that whenever unplugging a battery from anything, all your pulling force must be applied through the XT30 connection. If force is applied anywhere else, there is a risk of damaging the power lead connections to the battery
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And as a side note/reminder: please do not spin the motors when using the wall power supply, doing so will damage the ESC

[Mohammad Goli]

@James-Strawson The failed batteries include both types, with a higher occurrence among the Gaoneng packs.