I have to really watch battery power on my laptop, a Samsung Series 7 Chronos as we charge via solar and have three laptops, a chart plotter, nav lights, cabin lights and a fridge all draining the batteries on the boat.
The laptop battery is only 9% degraded as I've had the battery extender enabled a long time and I got this laptop because it had a 9 hour battery life. The use I get out of it is however more like 2-3 hours.
The reason is that the CPU usage is high. I've tracked this down to windows update. It seems to be consuming about 6-7% all the time. Even on a metered connection. With a few of the other services it needs to run the total is about 12-14%. That translates to about 28Watts total consumption. When these services are not running (exceedingly rare as I manually shut them down and they restart) the consumption goes down to about 9-11Watts, which is would give me the 9 hours that I should be getting.
Anyone know of a way to fix this?