{"product_id":"eppendorf-easypet-3-replacement-battery-37v-1050mah-li-ion","title":"Eppendorf Easypet 3 Replacement Battery 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEppendorf Easypet 3 — 3.7V Li-ion Replacement Battery (4430 605.009)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V Li-ion cell replaces OEM part 4430 605.009 in the Eppendorf Easypet 3 motorized pipette controller. At 1050mAh (3.89Wh), it powers the drive motor used for liquid aspiration and dispensing in laboratory and clinical workflows. The physical footprint matches the original at 56.14 × 29.45 × 11.00mm for direct installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEasypet 3 motor circuit compatibility:\u003c\/strong\u003e\n    The Easypet 3 draws variable current depending on pipette tip size and fluid viscosity. This cell's internal resistance profile and 3.7V nominal voltage match the motor controller's expected supply — the BMS handshake proceeds without fault codes on insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through the Easypet 3 startup sequence and full aspiration cycles. The BMS accepted the new cell, completed its internal checks, and passed motor load draws without tripping overcurrent protection across repeated cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this cell, let the Easypet 3 complete its power-on self-test without interrupting it mid-cycle. The device runs a BMS verification at startup — cutting power during this sequence triggers a false battery fault that persists 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\"\u003eCharge indicator not reaching 100% on the first charge after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Easypet 3 charge IC applies a conservative current ceiling on cells it hasn't previously profiled. On the first charge cycle with a new cell, the algorithm may terminate early or plateau below 100% — this is the charge controller being cautious, not a faulty cell. Run one complete charge-discharge cycle and the IC recalibrates its termination threshold. After that cycle, the indicator reaches full charge normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEasypet 3 shutting off unexpectedly during aspiration in the first week of use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells have slightly elevated internal resistance before their electrode structure fully forms. The Easypet 3 motor draws a sharp current spike at the start of each aspiration stroke — in the first 10 cycles, that spike can push voltage momentarily below the BMS cutoff threshold, triggering a shutdown. This is not a defective cell; it self-corrects as the cell cycles. Run several full charge-discharge cycles before returning the device to clinical use, and check that the resting voltage reads at least 3.6V before each session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381499232346,"sku":"BWCS-EXP605MD-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381499265114,"sku":"BWCS-EXP605MD-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381499297882,"sku":"BWCS-EXP605MD-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EXP605MD-1.webp?v=1778901265","url":"https:\/\/batteryweb.com\/products\/eppendorf-easypet-3-replacement-battery-37v-1050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}