{"product_id":"eppendorf-xplorer-replacement-battery-37v-450mah-li-polymer","title":"Eppendorf Xplorer Compatible Battery 3.7V 450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEppendorf Xplorer \/ Xplorer Plus — 3.7V Li-Polymer Replacement Battery (4861 601.000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 450mAh Li-Polymer cell replaces the original battery in the Eppendorf Xplorer and Xplorer Plus electronic pipettes. It matches OEM part number 4861 601.000 and H451987. Capacity is 450mAh (1.67Wh) — identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXplorer and Xplorer Plus compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The 74.50 × 21.50 × 5.50mm cell geometry fits the housing without modification, and the charge IC accepts the same current profile on both variants.\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 discharge on the Xplorer platform. The BMS accepted the cell without a fault flag, balanced correctly at top-of-charge, and held voltage within spec through the load profile the pipette motor draws during dispensing cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test requirement:\u003c\/strong\u003e\n    After installing this battery, allow the Xplorer to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-sequence trips a persistent battery fault that will not clear until the next clean reboot from a full charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Xplorer reports a low battery alarm immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Xplorer's charge IC calibrates its low-battery threshold against the internal resistance profile of the OEM cell. A new replacement cell has a slightly different impedance signature during the first few cycles, which causes the BMS to read state-of-charge conservatively and trip the alarm early. This is not a faulty cell — it is the BMS learn cycle running on unfamiliar chemistry. Run one complete charge-to-discharge cycle before clinical use. After that cycle, the charge IC updates its reference curve and the alarm threshold stabilises at the correct level.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eXplorer will not power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge during storage. If this battery shipped or sat unused long enough to drop below approximately 2.5V per cell, the Xplorer's BMS will refuse to engage — it interprets that voltage as a damaged or over-discharged cell and blocks the power-on sequence as a protection measure. Place the pipette on charge and leave it connected for a full uninterrupted charge cycle. Most BMS controllers re-initialise and accept the cell once it climbs back above the 2.8V recovery threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381492056154,"sku":"BWCS-EXP601MD-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381492088922,"sku":"BWCS-EXP601MD-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381492121690,"sku":"BWCS-EXP601MD-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EXP601MD-1.webp?v=1778901249","url":"https:\/\/batteryweb.com\/products\/eppendorf-xplorer-replacement-battery-37v-450mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}