Features: Rechargeability: The product adopts lithium battery technology, which can be charged and discharged multiple times, providing long-term reliable power support without the need for frequent replacement of button batteries. High performance: The product has high energy density and stable discharge characteristics, ensuring stable current output, and can provide long-lasting power supply for remote control watches, calculators, clocks and other devices. Environmental protections and energy conservation: The product can be recycled, reducing the demand for disposable button batteries and reducing the impact of discarded batteries on the environment. Size compatibility: The product size is similar as common button batteries and can directly replace common models such as LR2016 and CR2016, with wide ranges of adaptability. Long service life: The product has a long service life, effectively extending the equipment's service life and reducing inconvenience caused by battery replacement. Specifications: Material: Composite Material Quantity: 5pcs/card, 10pcs 2 card, 15pcs 3 card, 20pcs 4 card, 25pcs 5 card, 30pcs 6 card(optional) Model Name: LIR2016 LIR 2016 Lithium Batteries Dimension: 20x1.6mm Capacity: 20mAh Voltage: 3.6V Rechargeable: Yes Temperature Ranges:-20 to +60 Used for: Toy, calculators, pointers, clocks,watches, computers, games,digital voice recorders, remote control, electronic inst. Note: 5pcs per card, please select according to your need. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 5/10/15/20/25/30Pcs LIR2016 Button Batteries