24ct DISPLAY | The Ooze Standard Vape Pen Battery Display includes 24 individual batteries in a bright orange acrylic counter display. 8 of each size are included: 650, 900, and 1100 mAH. 4 batteries of each size are black, and 4 are chrome. PEN STYLE BATTERY | Each Ooze Standard Vape Pen Battery runs at a consistent voltage of 3.7V. 510 THREAD | Compatible with all 510 thread cartridges, and is intended for pre-filled oil, extract, essential oil, and delta-8 cartridges. BATTERY POWER | These are standard, no-frills devices that run at one temperature. The batteries will shut off after 20 seconds of heating. Click the button twice to activate preheat mode; the battery will heat for 15 seconds without holding down the button. WARRANTY | All Ooze Standard Batteries have a warranty, register them at www.oozelife.com with the authenticity code on the base near the bottom. Chargers are not included, but the use of a non-Ooze charger will void the warranty. We recommend purchasing a tub of Ooze Smart USB Chargers to display next to the batteries