# Help needed: what connector is used between the Modal AI PX4 battery and supplied charger?

Source: https://forum.modalai.com/topic/4791/help-needed-what-connector-is-used-between-the-modal-ai-px4-battery-and-supplied-charger
Category: ESCs, Sensors and Accessories (https://forum.modalai.com/category/15/escs-sensors-and-accessories)
Tags: power-module
Posted: 2025-10-02 18:31:50 UTC by mamuncanada
Replies: 2 · Views: 1175

## mamuncanada · 2025-10-02 18:31:50 UTC

Hello Modal AI / Forum Team,

I recently purchased the PX4 Autonomy Developer Kit (Modal AI VOXL), including the battery and charger you supplied. However, I am unable to connect the charger to the battery — the plugs don’t seem to match.

https://www.modalai.com/products/px4-autonomy-developer-kit?variant=46969886048560

Battery provided by Modal AI: [GNB Power Li-ion 3000, 2S1P, 7.4V, 22.2 WH]

Charger provided by Modal AI.
![41f79cc8-a4a3-4b82-aa2e-72ed02cca7e8-image.png](https://forum.modalai.com/assets/uploads/files/1759429657710-41f79cc8-a4a3-4b82-aa2e-72ed02cca7e8-image.png) 
![b83d0a3c-e40a-4408-a313-b36648e9dcac-image.png](https://forum.modalai.com/assets/uploads/files/1759429702410-b83d0a3c-e40a-4408-a313-b36648e9dcac-image.png) 
![ecd34a7f-e2bc-41d8-a1c7-09922e4a75b3-image.png](https://forum.modalai.com/assets/uploads/files/1759429738574-ecd34a7f-e2bc-41d8-a1c7-09922e4a75b3-image.png) 

Could you please help me with the following:

How do I connect the charger and battery? 

Do I need an adapter or extra cable assembly/connector to mate the charger and battery? If so, what is that part name, and where can I obtain it?

Any photos of the intended connection (battery side, charger side) would help me verify what I have vs what is required.

I greatly appreciate your help, as I’m eager to get things up and running without damaging components.

Thanks in advance,
Mamun

## Reply by tom (ModalAI staff) · 2025-10-02 19:24:44 UTC

@mamuncanada That wall power is for powering the drone for desktop development, NOT for charging batteries. Do not attempt to do so.

You'll need something like this for battery charging: https://www.getfpv.com/isdt-k2-air-bluetooth-20a-dual-smart-charger-discharger-ac-200w-dc-500w-x2.html?afid=aVlOV0hBdmd6THc9&referring_service=google-cpc&utm_source=google&utm_medium=cpc&utm_campaign=DM%20-%20NB%20-%20PMax%20-%20Shop%20-%20No-index%20-%20SM%20-%20ALL%20%7C%20Full%20Funnel&utm_content=pmax_x&utm_keyword=&utm_matchtype=&campaign_id=20799936859&network=x&device=c&gc_id=20799936859&gad_source=1&gad_campaignid=20796067361&gbraid=0AAAAAD8cN5L9gJu3gV54RY_LjzcQ-VdGt&gclid=CjwKCAjwxfjGBhAUEiwAKWPwDhmXgNPnOV8SQg3gtjuQcSNseWxDj6bsaCzj63BcRzyTE2uFVeRWORoCsjEQAvD_BwE

## Reply by mamuncanada · 2025-10-02 20:18:46 UTC (in reply to tom)

@tom Thank you very much for your information.