Is there a car charger available (using the cigarette lighter) that can charge both the N800 and a GPS BT receiver at once? For the receiver, it's the holux M1000 so it has a usb plug on one end and a mini usb plug on other (click for example).
I just rather not have to switch chargers everytime and it'll be nice if I could charge both at once.
I would just buy a simply 2-receptacle Black & Decker inverter/adapter and then use the power supplies from the two devices. That will cost about $20-$30. In one car I use one of these inverter/adapter and can, when needed charge two devices at the same time.
Here are several reasonably priced devices from B&D:
Or you want to grab two car chargers for different devices, and put them both in one case... A more compact solution if you have two cars and don't want two setups, but more work. I'm looking at making such an octopus to charge my N800, BT headset, and phone, and maybe GPS module, if I get one before I make it; undecided whether I will or not.
I have a 2 port USB cigarette lighter adapter. I'm fairly handy with electronics, however I'm concerned about voltage spikes (and they do happen when the engine is running). With the engine off I'm not concerned, but I'm not sure how much protection is built in to these and I'm afraid to find out.
A car cigarette lighter can put out more than enough power to charge any of these gadgets. With the right inverter, you can run small power tools and TV's. Just not too long without the engine running....