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I love the Winstick battery by Winberry Farms. I've owned three of them and they are great. Pluses are, cartridge can be retracted into the case for protection and concealability; it has its own chargine cable and it just looks cool. The only negative i experienced was, if you don't open the cartridge slowly if it's been stored, and let it snap open like a swtich blade, that shock is more than the Winstick can handle long term. So, open cartridge slowly by hand and you'll love this as much as I do!

I felt very comfortable there and the staff member who help me (AW) was patient, courteous sought to find the right products that we were seeking.