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Energy Storage Systems at Cell Sites Page of 4 Version: 1.1 <br />T-Mobile Internal Revision Date: 06/2025 <br />Additional ESS Requirements for Lithium-Ion <br />Requirement Lithium-Ion <br />Exhaust ventilation No <br />Explosion control <br />Spill control containment <br />Onsite Neutralization <br />Safety caps No <br />Thermal runaway protection - Provided by battery management system <br />Signage <br />Lithium-ion battery cabinets shall be posted with a caution sign with the exact wording as shown on the <br />Signage Catalog and Paper Strategies via Ariba. <br />T-Mobile Installations <br />T-Mobile has not approved installations for indoor sites at this time. <br />Ericsson Battery 6618 Lithium Iron Phosphate Battery (LFP) <br />Approved for: <br />Outdoor locations <br />the Rooftop Section. <br />6160 Cabinet Highlights <br />GR- <br />A heater for temperature control <br />Remote monitoring via the Controller 6610 communication module <br />BMS controls <br />In-cabinet smoke detection.