Here's a way to use less power

If you use a laptop on board for navigation, it’s worth seeing if it’ll run off a power source with its battery removed. If it doesn’t have to charge a battery it’ll use less power. Even better, find a 12V charger, to save the massively inefficient power use when using an inverter

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  • zeb

    If your laptop battery is already charged, then removing the battery won’t make any difference to consumption. If the battery is fitted, then the laptop will continue running if the power supply is interupted.