{"product_id":"anritsu-mt9090-replacement-battery-48v-2500mah-ni-mh","title":"Anritsu PT01426 MT9090 Replacement Battery 4.8V 2500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAnritsu MT9090 \/ MT9090A Series — 4.8V Ni-MH Replacement Battery (PT01426)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V 2500mAh Ni-MH replacement battery for the Anritsu MT9090 and MT9090A microwave transmission analyzers. It also fits the 909815B and 909814B units and over 30 additional MT9090-series variants. The pack replaces OEM part numbers PT01426, G0202A, and PT01496.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMT9090-series platform compatibility:\u003c\/strong\u003e\n    All covered models share the same 4.8V four-cell Ni-MH architecture, connector pinout, and BMS communication protocol. The battery management circuitry handshakes identically across the MT9090, MT9090A, 909815B, and 909814B, so one pack covers the full instrument family.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on a live MT9090A, running full RF sweeps and transmission line measurements under load. The BMS maintained stable output through repeated probe-module wake cycles and did not trip on cold-start current draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the MT9090 instrument menu before field deployment. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings on the first measurement session, even when the pack is fully charged.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMT9090 BMS lockout after the instrument sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day at room temperature. A pack stored for three or more months in a case can drop below the BMS recovery threshold — typically around 3.6V for a 4-cell pack — and the BMS enters a protective sleep state. The MT9090 will show no charging activity and may not power on at all. To recover the pack, apply a trickle charge at 100mA or less using a compatible external charger until cell voltage climbs above 4.0V, then transfer to the instrument for a normal charge cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMT9090 shuts down mid-sweep with no low-battery warning\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis failure is not a capacity problem — it is a voltage sag event. Under sustained RF sweep load, internal resistance in a degraded or cold pack causes a momentary voltage drop that the instrument interprets as a hard undervoltage fault, triggering an immediate shutdown before any warning can display. Ni-MH cells are particularly sensitive to this at low temperatures. Warm the instrument to above 10°C before starting a measurement session, and verify resting cell voltage is at or above 4.6V before deployment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360762265690,"sku":"BWCS-ATM909SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360762298458,"sku":"BWCS-ATM909SL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360762331226,"sku":"BWCS-ATM909SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ATM909SL-1.webp?v=1778616259","url":"https:\/\/batteryweb.com\/products\/anritsu-mt9090-replacement-battery-48v-2500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}