The two main options are Lithium Iron Phosphate (LiFePO4) and Lithium Ion/Lithium Polymer (Li-ion). LiFePO4 batteries use iron phosphate as the cathode material. This makes them inherently safe lithium batteries, as iron phosphate is highly stable.
[pdf] Researchers from Dalhousie University used the Canadian Light Source (CLS) at the University of Saskatchewan to analyze a new type of lithium-ion battery material – called a single-crystal electrode – that’s been charging and discharging non-stop in a Halifax lab for more than six years.
[pdf] Keep lithium batteries within the ideal temperature range of 15°C to 40°C to ensure safety, maintain performance, and extend lifespan. Use a battery management system (BMS) to monitor temperatures in real time and control cooling or heating to prevent damage and thermal runaway.
[pdf]