Rechargeable, Lithium-Ion Battery. The only BB-2590/U Certified for Military Use. Typically used in Communications / Chemical / CLU / Computer / Robotics: SINCGARS & ATCS (AN/PRC-104, 117, 119), FALCON (AN/PRC-138, 117) KY-57, MXF430 (V), AN/PSC-5, M22