Amazon.com: BAOBUTE 2Pcs ER6C AA PLC Battery 1800mah 3.6V Original MAXELL Replacement for FX F2-40BL FX1N PLC with Plug, ER6C AA/F2-40BL, 14*50.5mm : Health & Household
Amazon.com: ER6C AA 3.6V 1800mAh AA PLC Lithium Battery for FX F2-40BL with Connector : Health & Household
Amazon.com: SHENYANG (5 Pack) MAXELL ER6C AA 3.6V 1800mAh PLC Battery for FX F2-40BL with Plug : Health & Household