Coin & Button Cell Batteries

Check the device manual or the existing battery for the model number (e.g., CR2032, SR626SW), chemistry (lithium, silver-oxide, alkaline), voltage, and diameter/thickness; match those specifications exactly because size and voltage must fit and be compatible with the device's power requirements

Lithium cells (e.g., CR series) provide higher voltage (typically 3V) and long shelf life, silver‑oxide cells (SR) offer stable 1.55V output good for precise devices like glucose meters, and alkaline cells are lower cost with shorter life and less stable voltage; choose chemistry based on device voltage needs and sensitivity

Lifetime depends on device power draw and battery capacity; low‑drain devices like hearing aids or glucose monitors can last months to years per cell, while frequent‑use or continuous sensors may require replacement every few weeks to months; check device usage patterns and battery mAh or manufacturer guidance

Store cells in original packaging at room temperature, keep them away from children and pets, avoid shorting terminals, do not attempt to recharge non‑rechargeable cells, and dispose of used batteries at designated recycling centers to prevent leakage or ingestion hazards

Do not mix different chemistries, voltages, or new and used batteries in the same device because mismatched cells can cause uneven discharge, reduced performance, or leakage; use identical model numbers and, if replacing multiple at once, use cells from the same brand and batch when possible

Buy from reputable sellers, inspect packaging for clear labeling and lot numbers, compare cell markings and weight to known specifications, and avoid unusually low prices that deviate significantly from typical market ranges; reputable manufacturers often mark cell type and date codes on the battery

Factor in the device's battery consumption rate and replacement frequency; prices vary by chemistry and brand, so calculate annual cost by multiplying per‑cell price by expected replacements per year, and consider buying multi‑packs or higher‑capacity chemistries if they lower long‑term cost