{"product_id":"medela-vario-9190012-replacement-battery-12v-2000mah-ni-mh","title":"Medela Vario 919.0012 Replacement Battery 12V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMedela Vario 919.0012 — 12V Ni-MH Replacement Battery (EE090305)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 2000mAh Ni-MH replacement battery for the Medela Vario 919.0012 portable breast pump. It also fits the Vario 0777.1728, Vario 18 Suction Pump 077.1728, and Vario 8 variants that share the same motor voltage rail and connector. Voltage and capacity match OEM spec exactly — 12V, 2000mAh, 24Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVario pump series compatibility:\u003c\/strong\u003e\n    These Vario models run the same 12V DC motor platform with an identical battery bay and connector pinout. The BMS on each expects Ni-MH chemistry — swapping to a different chemistry triggers an immediate fault code on the charge controller.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and full motor-load discharge on a Vario unit. The BMS accepted the cell without fault flags, and the charge controller reached cutoff voltage cleanly on the first cycle without thermal interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap startup protocol:\u003c\/strong\u003e\n    After installing this battery, let the pump complete its full power-on self-test without pressing any buttons or cycling power. The Vario runs a BMS verification at startup — interrupting it causes a false battery fault that sticks until the next clean reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Vario pump shuts off mid-session in the first 10 cycles\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eFresh Ni-MH cells have slightly higher internal resistance before their chemistry stabilises. The Vario's BMS monitors voltage sag under motor load, and a new cell can dip enough during the suction cycle to trigger an undervoltage cutoff — even when the battery reads fully charged. This typically resolves by cycle 8 to 10 as the cell's internal resistance drops. Run three to four full charge-discharge cycles before relying on the pump for extended portable use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator stuck below 100% after first full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Vario's charge IC uses delta-V detection to determine end-of-charge on Ni-MH cells. On a brand-new cell, delta-V is less pronounced, so the charge controller applies a conservative termination and stops early. The battery is not defective — it has received a partial charge. Run one complete charge cycle from fully drained, and the charge IC recalibrates its threshold. After that cycle, the indicator should reach full without stopping short.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381428748378,"sku":"BWCS-MEV180MD-1","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381428781146,"sku":"BWCS-MEV180MD-2","price":65.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381428813914,"sku":"BWCS-MEV180MD-3","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MEV180MD-1.webp?v=1778900788","url":"https:\/\/batteryweb.com\/products\/medela-vario-9190012-replacement-battery-12v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}