1. 1.5V Constant Voltage Output – Peak Performance Until 0% Unlike traditional Ni-MH rechargeables that drop to 1.2V, TAKOO batteries maintain a steady 1.5V output from full charge until they are empty. This ensures your high-drain devices—like Xbox controllers, insulin pumps, and Blink cameras—run at peak performance without lagging or dimming. 2. 1.5H Fast Charging via Integrated USB-C Say goodbye to bulky, proprietary charging docks. Each battery features a built-in Type-C port, allowing you to charge directly with any standard USB-C cable. Achieve a full charge in just 1.5 hours, saving you hours compared to old-school chargers. 3. Massive 3000mWh Capacity & 2000+ Cycles Built for endurance and savings. One TAKOO AA battery can replace up to 2000 disposable alkaline batteries. With a high energy density of 3000mWh, it provides long-lasting power for high-performance devices while dramatically reducing environmental waste and long-term costs. 4. Advanced Safety Protection & LED Indicator Engineered with a sophisticated built-in safety chip that prevents overcharging, short-circuits, and overheating. The intuitive flashing blue LED ring around the positive pole provides a clear charging status at a glance, ensuring a safe and reliable user experience every time. 5. Extreme Weather Resistance & Universal Fit These lithium batteries outperform alkaline competitors in extreme hot or cold temperatures, making them the perfect choice for outdoor security cameras (like Blink) and flashlights. Designed to standard AA/AAA sizes, they fit perfectly into any household device, RC toy, or medical equipment.