{"product_id":"drummond-scientific-portable-pipet-aid-xl-replacement-battery-36v-700mah-ni-mh","title":"Drummond Scientific Pipet-Aid XL 3.6V Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDrummond Scientific Portable Pipet-Aid XL — 3.6V Ni-MH Replacement Battery (4-000-036)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V 700mAh Ni-MH cell replaces OEM part 4-000-036 in the Drummond Scientific Portable Pipet-Aid line. It fits the Portable Pipet-Aid XL, XP2, PK, and related models that share this battery form factor. Physical dimensions are 44.80 x 25.10 x 18.00mm — confirm fitment before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePipet-Aid XL, XP2, PK platform:\u003c\/strong\u003e\n    These models share the same 3.6V Ni-MH battery bay and connector pinout. The BMS in each device reads cell voltage at startup to verify chemistry match — a cell outside the expected voltage window at power-on will trigger a fault flag regardless of actual charge state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the bench. The BMS accepted the cell without a chemistry fault, and the charge circuit completed a full charge cycle to termination without hitting delta-V cutoff prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap power-on sequence:\u003c\/strong\u003e\n    After installing this cell, let the device complete its full power-on self-test without interruption. The Pipet-Aid BMS runs a voltage verification pass at boot — cutting power mid-sequence leaves a false battery fault latched in firmware 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\"\u003eWhy the Pipet-Aid XL reports low battery immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pipet-Aid charge IC uses delta-V detection to determine end-of-charge, but it also applies a minimum voltage threshold during the BMS self-test at startup. A new Ni-MH cell that has not completed at least one full charge-discharge cycle will sit at a resting voltage slightly below the OEM cell's conditioned baseline. The BMS reads this as a marginal or low cell and raises a battery warning even though the cell is fully charged. Running one complete charge-discharge cycle conditions the cell voltage profile to match what the firmware expects. After that cycle, the low battery flag clears and does not return.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePipet-Aid won't power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge in storage at roughly 1–3% per day depending on temperature. A cell stored for several weeks can drop below 3.0V — the point at which the Pipet-Aid BMS refuses to initiate a charge cycle, treating the cell as damaged rather than depleted. Place the cell on a standalone Ni-MH charger capable of a recovery or trickle charge at 50–70mA to bring voltage above 3.2V first. Once above that threshold, reinstall the cell and the device charge circuit will resume normal operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381499134042,"sku":"BWCS-DSP036MD-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381499166810,"sku":"BWCS-DSP036MD-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381499199578,"sku":"BWCS-DSP036MD-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DSP036MD-1.webp?v=1778901249","url":"https:\/\/batteryweb.com\/products\/drummond-scientific-portable-pipet-aid-xl-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}