You may have encountered such a situation: the charged and discharged batteries are mixed and you dont have a tester to separate them. Then you need this convenient indicator to help you. You can set the fully charged batter green and the discharged battery red. And you can also record the usage times of the battery on the sticker. Features: High quality, easy to use. Sliding design: slid to green after charged and slid to red after discharged. Sticker included, which can be used to record usage times of the battery. Stays firmly, no worry about sliding or take off by itself. For rechargeable battery such as LiPo/LiFe/NiMH/NiCD battery. Specification: Item name: Battery Charge Marker Material: Plastic Indicator Size: 22 * 10 * 3mm Sticker Size: 60 * 30mm Indicator Weight: 0.7g / pcs Package information: Package size: 9.0 * 8.0 * 0.5cm / 3.5 * 3.1 * 0.2in Package weight: 17g / 0.6oz Polybag package Package Included: 10 * Battery Charge Marker 10 * Record Sticker