AKTTKA 8 Pack Rechargeable AA Batteries, 1.5V Lithium, 4070mWh, 500+ Cycle

4070mWh High Capacity — Longer Runtime, Fewer Recharges: Each of the 8 AA rechargeable batteries delivers 4070mWh — high-capacity lithium batteries built for demanding devices. Enjoy up to 40% longer runtime than standard rechargeable batteries in Ear Thermometer, Game Controller, Smart locks, Heizkörperthermostate and high-lumen flashlights. Spend less time replacing batteries and more time using your devices with dependable rechargeable power. USB-C Direct Charging — Charge 4 at Once: Skip the bulky charging base. The included 1-to-4 USB-C charging cable plugs straight into each lithium battery — charge 4 at once from USB-C adapter, power bank, or laptop. The built-in LED indicator shows green flashing while charging and solid green when fully charged, so you can monitor progress at a glance. Keep 4 batteries powered while using the other 4 — no downtime, no extra charger to buy. 1.5V Constant Voltage — Stop Low-Battery Warnings: Standard 1.2V NiMH rechargeable batteries may lead to dimming lights, laggy controllers, and sensor errors. AKTTKA 1.5V lithium batteries hold a steady 1.5V output throughout the discharge cycle, so your devices run at their best — bright flashlights, responsive gaming controllers, and reliable smart home sensors. Consistent voltage, consistent performance. No Memory Effect — Ready When You Are: Unlike standard NiMH rechargeable batteries that may gradually lose capacity if charged before fully drained, AKTTKA lithium batteries have no memory effect — top them up whenever convenient without affecting lifespan. A low self-discharge rate means these AA batteries hold their charge during long-term storage, so spare batteries in your drawer or emergency kit stay ready when you need them. Practical, low-maintenance power for everyday use. 6-Layer Safety — A Smarter Alternative To Disposable AA Batteries: Built-in protection guards against over-charge, over-discharge, over-current, short-circuit, over-voltage, and over-heating — so every charge is as safe as it is efficient. Each AKTTKA rechargeable battery lasts up to 500+ charge cycles, meaning 8 batteries can replace hundreds of disposable batteries over their lifetime. Less waste for the environment — a practical choice for eco-conscious households.