How long does a power bank actually last while IRL streaming?
By Elan Harpaz · Published 2026-10-17
Capacity on the box is not runtime in the field. What a 20,000 mAh bank really gives you once conversion losses and a full rig are accounted for.
Your encoder tops out at 1080p60. A higher-end encoder would go further.
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| Component | Pick | Price | |
|---|---|---|---|
| Camera | DJI Osmo Pocket 3 Gimbal cam with great low light, USB webcam mode, and DJI mic pairing. The IRL favorite. Buy on Amazon | $495 | Buy on Amazon |
| Encoder | Orange Pi 5 + belaBOX Dedicated HDMI-in encoder running the free, open-source belaBOX firmware with SRTLA bonding. The DIY backpack heart. Buy on Amazon | $150 | Buy on Amazon |
| Connection | Netgear Nighthawk M6 5G mobile router with an ethernet port, so you wire it straight to the encoder. Buy on Amazon | $447.22 | Buy on Amazon |
| Data Plan | Visible Unlimited Truly unlimited data on the Verizon network. The IRL favorite for a cheap single line. Learn more | ~$25/mo | Learn more |
| Bonding | belaBOX SRTLA Bonds several connections to your relay, built into the belaBOX encoder. Free. Learn more | Free (with belaBOX) | Learn more |
| Relay / VPS | belaBOX Cloud Managed SRT relay plus phone control to start/stop the encoder. The cheap, popular choice. Learn more | ~$10/mo | Learn more |
| Power Bank / Portable Battery | SHARGEEK 140 (20K, 140W) High-capacity, high-wattage bank that runs a power-hungry encoder all day. Buy on Amazon | $79.89 | Buy on Amazon |
| Audio | DJI Mic Mini Tiny wireless lav that pairs straight to the Osmo Pocket 3, keeping audio in sync. Buy on Amazon | $79 | Buy on Amazon |
| Backpack / Case | Vivicreate Transparent Bubble Pack A transparent, heavily ventilated bubble pack (sold as a cat carrier) with standout airflow. Roomy and breathable for a hot-running rig if you embrace the look. Buy on Amazon | $21.99 | Buy on Amazon |
A 20,000 mAh bank does not give you 20,000 mAh of useful power. Cells are rated at 3.7 volts and your gear wants 5 volts or more, so after conversion you keep roughly 60 watt hours of the 74 on the label. Every runtime figure below starts from that corrected number, which is why they are shorter than the marketing suggests.
What each part of the rig draws
- Encoder board: the biggest constant draw in a DIY bag, and it runs the whole time.
- Modem: high while transmitting, and it climbs as signal gets worse. A weak-signal day costs battery as well as bitrate.
- Camera: small in comparison, but a camera that will not charge while outputting video becomes the limit no matter how big the bank is.
- Phone as a second screen: easy to forget, and it drains from the same bank.
Buying for a real session
Work out the hours you actually stream, then buy for that plus a margin, because cold weather and weak signal both cut it. Two medium banks beat one large one: you can hot-swap without ending the stream, and airline rules cap what you can carry.
High wattage output with a display that shows real draw, which is the fastest way to learn what your rig actually costs per hour.
When something in the bag wants 12 volts rather than USB, this is the simple answer.
The step up to broadcast batteries, worth it once you are running a camera and encoder off one supply all day.
Frequently asked
Why does my 20,000 mAh bank not last as long as the maths suggests?
Because mAh is quoted at the cell voltage of 3.7 V and your gear runs at 5 V or higher. After conversion losses a 20,000 mAh bank delivers roughly 60 Wh of usable energy rather than the 74 Wh on the label.
Can I hot-swap a battery without ending the stream?
Yes, if your gear is on separate supplies or you use a bank that passes power through while charging. This is the main practical argument for two medium banks over one large one.
About this guide. Written by Elan Harpaz. We do not lab-test hardware. Every quality verdict on this page is a planning budget computed from a published model, and every price is a tracked estimate rather than a live one. How the numbers are derived: methodology. How picks are chosen: editorial policy.
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