Marbero Portable Power Station. Small but Mighty! 

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Here's a short overview of this little Marbero power supply. I've used this for the past year for tons of charging needs and it's worked flawlessly for me. Right now, there is a good sale on these I wanted to pass it on. I dont know when the coupon sale goes away but even so they are a decent product for the money for an entry level power supply. It does the basics well.