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Skywatcher 7Ah Power Tank
Hi Graham, I would go along with what Merlin suggested, add up everything that consumes power, I mean everything, eg amps then work out how long you want to run this equipment in hours, then you can work out what size battery you will need to run your equipment for that time. The power packs have their place, I have two 12 volt 17 ah Power tech ones I use them for the USB ports and the lighter sockets. I also have a 65ah deep cycle as well and even then I can run short of power. I got caught out when I set my system up I forgot to add my computer, it draws 65amps on its own. Hope this helps, I would forget about the 7ah it wont last long, it could jump start your car if needed. Robert
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