| Brand: | Xiaomi |
| Model: | Redmi 9 Activ |
| Release Date: | 2021, September 24 |
| Size: | 6.53 inches, 102.9 cm2 (~81.0% screen-to-body ratio) |
| Resolution: | 720 x 1600 pixels, 20:9 ratio (~269 ppi density) |
| Technology: | IPS LCD, 400 nits (typ) |
| Main Specs: | 13 MP, f/2.2, (wide), PDAF, 2 MP, f/2.4, (depth) |
| Main Features: | LED flash, HDR |
| Main Video: | 1080p@30fps |
| Selfie Specs: | 5 MP, f/2.2, (wide), 1.12µm |
| Selfie Features: | HDR |
| Selfie Video: | 1080p@30fps |
| Capacity: | Li-Po 5000 mAh, non-removable |
| Type: | Li-Po |
| Chipset: | MediaTek MT6765G Helio G35 (12 nm) |
| Ram: | 4GB |
| Storage: | 64GB |
| Expandable: | microSDXC (dedicated slot) |
| Dimensions: | 164.9 x 77.1 x 9 mm (6.49 x 3.04 x 0.35 in) |
| Weight: | 194 g (6.84 oz) |
| Wifi: | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| Bluetooth: | 5.0, A2DP, LE |
| Nfc: | No |
| Usb: | microUSB 2.0, USB On-The-Go |
| Headphone Jack: | Yes |
| Network: | GSM / HSPA / LTE |
| Sensors: | Fingerprint (rear-mounted), accelerometer, proximity |
| Colors: | Carbon Black, Coral Green, Metallic Purple |