Hello, astronomers! When we search for a low light-polluted sky, we usually haven't any power outlet readily available when we have to move with our telescope. And since a modern astrophotography telescope is composed of many devices that might require considerable power, choosing the correct battery is critical in order to allow us to use our telescope all night long. All night long! Thanks to the Eagle distribution of power to your 12 volt devices, you will just need a single battery to power your entire telescope. So you can build a feed battery yourself or you can search for a battery system to buy. We got in contact with Echoflow, a company specialised in high capacity portable lightweight power stations. And we tested the line of smart batteries called Reaver to see if they can improve your Eagle Power Telescope's portability. Reaver is a portable power station that integrate high-capacity lithium batteries, so they are more compact and lightweight than a standard deep-cycle 12 volt battery of a comparable capacity. You might be asking yourself, why does prima-luce lab recommend this battery above the others on the market? Our recommendation is based on the cigarette plug power outboard they offer. It's not simply rated 12 volts, but in reality it's 13.3 volts, and this is the perfect solution to plug the power cable included the Eagle. In fact, because of the architecture of the power distribution in the Eagle, when you power many devices, you have to take into consideration a small voltage drop that slightly reduces the final voltage at the power outboard. For example, if you connect your Eagle to a battery with an output of exactly 12 volts and your Eagle has to power many devices, the voltage at power outboard of the Eagle may end up lower than 12 volts. And if the voltage drops lower than 11.6 volts, the Eagle will automatically shut down and disconnect power for safety. That's why the optional AC power adapter for the Eagle is rated at 12.8 volts. If you want to run off of a battery, it's critical to have a voltage higher than 12 volts. This makes the 13.3 volts of output from the cigarette power part of the river a perfect match for our Eagle power cell scope. Let me show you. When I turn on the power ports in the Eagle manager and deactivate camera cooling, you can see that the voltage of the Eagle remains above 12 volts. And since the river uses lithium batteries, the voltage is very stable until battery is fully discharged. So your last autography setup will correctly work for the entire battery lifetime. Another useful feature for autography is the projected battery lifetime based on your time power consumption. You can read in the front panel of the river power station. Of course, you can compare this with the power consumption data available in the Eagle manager, but the display allows you to have a quick look of the battery status even without having to be connected to your remote desktop connection. Here at Primalucila, we tested the river model with 288 vatt-hawarth capacity. That by considering a telescope with around 5M power consumption, should allow around 4.5 hours of lifetime. It weights 5 kilos. The larger river pro-model with 720 vatt-hawar capacity allows around 10.5 hours of lifetime with the same telescope power consumption. It weights 7.3 kilos. Both batteries are able to improve your telescope portability, so it's a perfect match for your Eagle powered autography setup. For more content that we have, be sure to explore the universe like a pro, subscribe to our channel and clear skies! you