# Prism 877 4K 10bit HEVC/AVC Encoder/Decoder Card on a 50 Wh battery

Data version 6d29e2f86993, built 2026-10-26; facts on this page checked 2026-10-21.

**Prism 877 4K 10bit HEVC/AVC Encoder/Decoder Card runs about 4.2 h at typical draw and 2.8 h at maximum draw on a 50 Wh battery.**

## Inputs

- product Prism 877 4K 10bit HEVC/AVC Encoder/Decoder Card
- battery 50 Wh

## Workings

- At typical draw: 50 Wh ÷ 12 W = 4.2 h.
- At maximum draw: 50 Wh ÷ 18 W = 2.8 h.

## Constants

- From Teradek product data, seen 2026-10-21: Prism 877 4K 10bit HEVC/AVC Encoder/Decoder Card typical power draw 12 W; Prism 877 4K 10bit HEVC/AVC Encoder/Decoder Card maximum power draw 18 W.

## Assumptions

- Runtime = battery watt-hours ÷ the product's stated draw: an estimate, not a measured runtime.
- Not included: the monitor, camera and accessories on the same battery, conversion losses, battery ageing and cold.

Power: [/products/prod.prism-877-encoder-decoder-card/power.md](https://specs-dev.teradek.com/products/prod.prism-877-encoder-decoder-card/power.md).

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