Combining a smaller footprint than AA with full 3.6 V Li-SOCl₂ power, the 2/3AA smart meter battery enables innovative, low-profile meter enclosures without compromising on runtime or reliability, retaining over 90% capacity after 10 years and featuring ultra-low self-discharge, while ISO9001, UL, and IEC-certified production ensures each cell meets the highest quality benchmarks for niche utility and industrial applications.