{"product_id":"siemens-mag-8000-flowmeter-replacement-battery-36v-27000mah-li-mno2","title":"Siemens MAG 8000 FlowMeter Replacement Battery 3.6V E-1574","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSiemens MAG 8000 FlowMeter — 3.6V Li-MnO2 Replacement Battery (E-1574)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V 27000mAh lithium-manganese dioxide battery replaces the original E-1574 (also listed as 087L4150) in the Siemens MAG 8000 FlowMeter and Mag 8000 Flow Transmitter. It powers the meter's electronic measurement circuit and data transmission functions. Without a functioning cell, the unit stops logging flow data and loses any accumulated totals held in volatile memory.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMAG 8000 and Mag 8000 Flow Transmitter compatibility:\u003c\/strong\u003e\n    Both units share the same internal battery bay dimensions and draw from the same 3.6V supply rail. The E-1574 cross-reference confirms a single cell specification covers the full platform, so no adapter or rewiring is needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We verified terminal voltage at 3.6V nominal, confirmed polarity orientation matches OEM markings, and checked that the BMS holds stable under the low-current draw typical of electromagnetic flow sensing circuits.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMAG 8000 data retention on swap:\u003c\/strong\u003e\n    The MAG 8000 stores totaliser and configuration data in non-volatile memory, but the swap window still matters. Change the cell quickly — prolonged removal while the unit is unpowered can cause the real-time clock to reset, which affects timestamped data logs and scheduled transmission intervals.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MAG 8000 shows a battery alarm before the cell is fully depleted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MAG 8000 triggers its low-battery alarm well above actual cell depletion — typically when terminal voltage drops to around 3.2V. This is intentional: the meter needs enough reserve voltage to complete any in-progress data transmission and write final totals to memory. If the alarm appears on a freshly installed cell, the cell may have self-discharged during storage. Li-MnO2 chemistry has a very low self-discharge rate, but cells stored for several years can sit below the alarm threshold before installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMAG 8000 real-time clock resets after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the unit shows a clock error or incorrect timestamp after a battery swap, the RTC lost power during the changeover. This happens when the old cell is removed and the new one isn't seated quickly enough — the internal capacitor that briefly sustains the clock drains in seconds. To fix it, connect a configuration laptop via the service interface and re-enter the correct time and date using the MAG 8000 commissioning software. Confirm the clock is running correctly before leaving the installation by checking the timestamp on a live flow log entry.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43315055853658,"sku":"BWCS-SMA800AF-1","price":50.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43315055886426,"sku":"BWCS-SMA800AF-2","price":58.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43315055919194,"sku":"BWCS-SMA800AF-3","price":65.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMA800AF-1.webp?v=1777949431","url":"https:\/\/batteryweb.com\/products\/siemens-mag-8000-flowmeter-replacement-battery-36v-27000mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}