How do you remove the battery

How do you remove the battery
How do you remove the battery.
| Video Output | 1 HDMI, 1 VGA |
|---|---|
| HDD Interface | SATA |
| Hard Drive Support | Up to 6TB |
| Video Compression | H.264 |
| USB Interface | 2 USB 2.0 |
| Operating Humidity | 10% to 90% |
| Video Input | 8 channels |
| Recording Resolution | 1080p/720p/960H/D1 |
| Network Interface | 1 RJ-45 (10/100Mbps) |
| Power Supply | DC12V |
| Audio Input/Output | 1 channel input, 1 channel output |
| Playback Resolution | 1080p/720p/960H/D1 |
| HDMI Output Resolution | 1920x1080 |
| VGA Output Resolution | 1920x1080 |
| Power Consumption | <10W (Without HDD) |
| Operating Temperature | -10°C to +55°C |
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