Introducing the next level of power!  Our Zola Extreme Power Wireless Battery gives the highest level of working power with up to 12 hours of operating time. Our new sleek design creates stability and a more balanced weight experience than our original Zola wireless battery. Experience optimal power today! Details:Input voltage: 5vOutput voltage range: 4v - 12vBattery capacity: 1600MAWorking time : 10 - 12 hours Charging time: 6 hoursWeight: 52gIt operates for up to 12 hours and has a high voltage range of 4- 12 volts.  WARRANTY We provide a 6 month warranty for our ZOLA machine. Please email our MBL Support Team (info@moorebeautylove.com) with a copy of your receipt and a mini video of your challenge. Our warranty department will contact you to troubleshoot. If the issue cannot be rectified and is not due to user error, we will request you to ship us your battery for our in person review of the malfunction. This process can take up to 2 - 3 weeks before a replacement battery is sent. Replacement batteries are also based on availability. RETURN / EXCHANGE POLICY There are NO REFUNDS OR EXCHANGES on any MooreBeautyLove PMU machines or wireless batteries. If your item is damaged during shipping, please email info@moorebeautylove.com within 48 hours of receiving your product.