Product overview
The ISDT MA331 is a three-channel charging accessory for DJI Air 3/3S batteries, model BWX233-4241-14.76; Air 3S charging requires firmware version 1.0.1.12 or later. Its parallel architecture charges three batteries simultaneously. An exposed-battery layout and active cooling fan assist heat dissipation, while a built-in color display shows charging power and battery status. The hub measures 170.4 × 59.6 × 52.3mm and weighs 152g with a ±10% tolerance, excluding cables. An integrated LED provides one-button illumination.
Two 100W USB-C inputs provide power, and a separate 45W USB-C output serves devices such as remote controllers and phones. Charging power is 80W maximum for one battery or 200W maximum for three batteries plus a remote controller. With dual 100W PD inputs, charging to 95% takes approximately 50 minutes for one battery or 70 minutes for three. Charging to 100% takes approximately 60 or 90 minutes respectively under the same input conditions. The auxiliary output can use a USB supply or a drone battery as its power source.
Battery management includes a storage mode that charges batteries to 60%, a consolidation function that transfers energy into the battery with the highest remaining charge, and an equalization function for batteries with different charge levels. These functions complement the separate 95% fast-charge and 100% full-charge modes. Polying App provides control and OTA firmware updates without registration, with access from phones, watches, tablets and PCs. For Air 3S battery use, the installed hub firmware must be version 1.0.1.12 or later.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | ISDT MA331 smart charging hub |
| Compatible batteries | DJI Air 3/3S series batteries (BWX233-4241-14.76)DJI Air 3S battery charging requires firmware version 1.0.1.12 or later. |
| USB Type-C input 1 | 9V~3A; 12V~3A; 15V~3A; 20V~5A |
| USB Type-C input 2 | 9V~3A; 12V~3A; 15V~3A; 20V~5A |
| USB Type-C output | 5V~2A; 9V~3A; 12V~3A; 15V~3A |
| Maximum single-battery charging power | 80W MaxSingle battery. |
| Maximum combined charging power | 200W MaxThree batteries plus a remote controller. |
| Dimensions | 170.4 × 59.6 × 52.3mm |
| Weight | 152g (±10%)Excluding cable weight. |
| Charging architecture | Three-channel parallel fast charging, with three batteries charging simultaneously. |
| Dual input power | 2 × 100W USB-C inputs |
| Auxiliary output | Separate 45W USB-C output for charging remote controllers, phones and other devices.Powered by a USB supply or a drone battery. |
| Fast-charge duration | Approximately 50 minutes for one battery; approximately 70 minutes for three batteries.Fast-charge mode to 95%; dual 100W PD inputs; ISDT laboratory measurements. |
| Full-charge duration | Approximately 60 minutes for one battery; approximately 90 minutes for three batteries.Full-charge mode to 100%; dual 100W PD inputs; ISDT laboratory measurements. |
| Storage charge target | 60% chargeStorage mode. |
| Charge consolidation | Transfers energy from multiple batteries into the battery with the highest remaining charge.Multiple batteries connected. |
| Charge equalization | Equalizes battery charge levels.Connected batteries have unequal charge levels. |
| Cooling architecture | Active fan cooling and an exposed-battery layout that assists heat dissipation. |
| Built-in display | Color display with digital power and battery-status information. |
| App control and firmware updates | App control and OTA updates; no registration required; app use on phones, watches, tablets and PCs.Polying App. |
| Required firmware | Firmware version 1.0.1.12 or laterCharging DJI Air 3S batteries. |
| Integrated lighting | LED light with one-button activation. |
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