MSRP: $18

    Warranty: Lifetime

    We picked up one of the newer version O-Pen stick batteries to see if it would work in a pinch. And it did. The battery is simple enough: charge, screw and draw. For hotter temps, simply press the stylus bottom to the color you desire (see box for levels). All in all, a good value for the price.

    Overall: ★★★★

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