The SmallRig T221 Triple-Proof IP54 Waterproof V-Mount Battery (221Wh) features a 14.8V, 221Wh, 15,000mAh rated capacity and multiple ports for powering various accessories.
Key features
- Triple-Proof Durability, IP54 Rated
- 14.8V | 221Wh | 15,000mAh
- D-Tap, USB-C, USB-A
- 140W PD Bidirectional Fast Charging
- 5.9′ Drop-Resistant Housing
- BMS Intelligent Control Chip
- Backlit Status Indicator
- 1/4″-20 and 3/8″-16 Thread Mounts
- Overheating and Overcharging Protection
- Includes 240W USB-C Charging Cable

The battery features what SmallRig describes as a triple-proof design. It has an IP54 rating, making it waterproof and dustproof, while the housing is drop-resistant up to 5.9′ / 1.79cm. There is also overcurrent, overvoltage, and over-charging/discharging protection.
SmallRig includes 1/4″-20 and 3/8″-16 threads, providing mounting options, and there are backlit indicator lights that enable easy operation even in low-light conditions.
The T221’s independent circuits let you use one USB-A, two USB-C, and four D-Tap ports to power and charge multiple devices at once. The USB-C ports support 140W bidirectional PD fast charging, and an integrated BMS control chip enables rapid battery charging in just two hours.
- 4x D-Tap/P-Tap Female Input/Output
- Input: 151 W Maximum (Up to 16.8 VDC at 9 A)
- Output: 151 W Maximum (Up to 16.8 VDC at 9 A)
- 2x USB-C Female Input/Output
- Input: 140 W Maximum (Up to 28 VDC at 5 A)
- Output: 140 W Maximum (Up to 28 VDC at 5 A)
- 1x USB-A Female Output
- Output: 36 W Maximum (Up to 12 VDC at 3 A)

The battery weighs in at 3.7 lb / 1.7 kg and has physical dimensions of 5.9 x 3.8 x 3.7″ / 149.1 x 96 x 95.2 mm.
Pricing & Availability

The SmallRig T221 Triple-Proof IP54 Waterproof V-Mount Battery (221Wh) is now available to pre-order for $439.99 USD.







