For oil and gas downhole tools, remote wireless sensors and smart utility meters, battery replacement often costs more than the instrument itself. MAGNATE New Energy builds high-reliability Li‑SOCl2 batteries engineered for multi-year standby operation in remote, high-temperature field environments. Our Li‑SOCl2 batteries maintain a flat 3.6V discharge plateau with minimal annual self-discharge, eliminating frequent replacements for hard-to-access equipment such as oil and gas downhole MWD/LWD tools, remote wireless sensors and smart utility meters. These primary lithium cells withstand extreme temperature swings that render many alternative battery chemistries unusable. We customise terminations including solder pins, axial leads and custom connectors to match instrument PCB layouts and mechanical assembly limits. Each unit undergoes discharge and thermal validation before shipment. Send us your operating temperature range and annual self-discharge limit, and we will recommend the Li‑SOCl2 configuration suited for your mission-critical field hardware.