ACCU-4/3A/L is a rechargeable 4/3A lithium-ion battery with a capacity of 2900mAh. It is made by Panasonic and is designed for use as an auxiliary power source in medical and industrial applications, as well as in consumer electronic devices. The battery offers a high energy density and low self-discharge rate, ensuring a long service life. It also features over-charge and over-discharge protection circuitry for added safety. Additionally, it is lightweight and offers reliable portability for convenient use.