Rice Power, I'm afraid that you're not correct on a number of points. The codes "ELI" and "ELM" are not ICAO codes, they are IATA Cargo Interline Message Procedures (IMP) codes. ELI = excepted lithium ion batteries and ELM = excepted lithium metal batteries. There are also two other cargo IMP codes for lithium batteries, RLI = fully regulated, i.e. Class 9 lithium ion batteries and RLM = fully regulated lithium metal batteries.
Both types, excepted and fully regulated may be carried on both passenger and cargo aircraft, except that all lithium batteries are prohibited to, from and within the US when shipped as just batteries.
For some up to date information please read
Lithium Batteries - Guidance and Packing Instructions