EAM85130-1 Team EAM 1S 3.7v 8500mAh 130C Graph-X Li-Po Battery w/ 5mm Bullets | eBay
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Amazon.com: Original Osmo Action 3 Extreme 1770 mAh Battery for DJI Osmo Action 3 Camera(Supports up to 160 minutes of battery life, continuous recording for up to 150 minutes in -20° C (-4° F) temperatures) : Electronics
This 18,000mAh Energizer battery has a phone in it - The Verge