The safe battery The integrated electronics protect the cell from overcharging, overload, short circuits, and deep discharging. This makes the battery perfectly protected against improper handling, guaranteeing a long lifespan. The perfect replacement for batteries The high-quality lithium-ion (Li-Ion) battery from ANSMANN is the ideal replacement for 1.5 V alkaline single-use batteries or rechargeable 1.2 V NiMH batteries. While some battery-operated devices have problems with the lower output voltage of NiMH batteries, the 1.5 V Li-Ion battery is fully compatible with alkaline batteries. In addition to being rechargeable, it also stands out, thanks to built-in electronics, with a constant output voltage of 1.5 V for over 95% of the operating time. When the battery has a remaining capacity of about 5%, the output voltage is reduced to 1.1 V to signal to the user that the battery should be replaced. Easy charging via USB Thanks to the integrated USB-C charging port, no additional chargers are needed! With this, 4 Micro AA batteries can be charged simultaneously using just one cable. This guarantees safe and easy charging through all available USB charging options. The indicator at the positive terminal of the battery blinks during the charging process. Once the charging is complete, it lights up continuously. Low weight, low self-discharge, and high cycle resistance The Micro AA Li-Ion battery is extremely durable and can be recharged up to 1200 times even under harsh operating conditions. Due to its very low self-discharge, the battery retains its energy for a long time even when not in use. Additionally, the weight of the Li-Ion cell is significantly lower compared to traditional battery technologies (e.g., NiMH/PB) for the same performance.