{"product_id":"ibm-thinkpad-i1400-replacement-battery-96v-4500mah-ni-mh","title":"IBM ThinkPad i1400 Replacement Battery 9.6V 4500mAh 02K6530","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIBM ThinkPad i1400 Series — 9.6V Ni-MH Replacement Battery (02K6530)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V 4500mAh (43.2Wh) Ni-MH battery for the IBM ThinkPad i1400 and i1500 series laptops, including Model 2621-XXX variants. It replaces OEM part numbers 02K6530, 02K6630, and the ASM-prefix equivalents. Fit confirmed against the ThinkPad i Series connector and voltage rail.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThinkPad i1400 \/ i1500 compatibility:\u003c\/strong\u003e\n    Both the i1400 and i1500 share the same 9.6V battery bay, connector pinout, and BMS handshake protocol — that is why a single cell covers the full range including the 2621-XXX model variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a ThinkPad i Series unit. The BMS accepted the cell without fault codes, and charge current tapered correctly at top-of-charge as expected with Ni-MH termination.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on Ni-MH:\u003c\/strong\u003e\n    After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. Ni-MH cells in this ThinkPad generation require this cycle to reset the BIOS battery learn routine — skipping it leaves the fuel gauge reading 20–30% low for the life of the pack.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ThinkPad i1400 BIOS reads health data from an EEPROM register that was written by the original factory cell. When a replacement cell arrives, that register still holds the old degraded-cell data. The BIOS has no way to distinguish a worn cell from a new one until it runs a full learn cycle. One complete discharge to hibernate cutoff followed by an uninterrupted charge to 100% forces the firmware to overwrite the stale EEPROM values. After that cycle, the health indicator clears and the reported capacity aligns with the actual 4500mAh rating.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly while the gauge still shows charge remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff failure caused by high simultaneous load from the CPU and display pulling the cell below the BMS cutoff threshold before the fuel gauge catches up. Ni-MH cells have a steeper voltage drop curve under load than the fuel gauge IC expects, especially in the first few cycles on a new cell. The gauge IC needs two to three calibration cycles against the new chemistry before its load-compensation model becomes accurate. Run the full discharge-to-hibernate conditioning cycle twice consecutively — after the second cycle the shutdown-under-load behaviour resolves as the gauge recalibrates to the actual cell curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410880495706,"sku":"BWCS-IB1400HB-1","price":79.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410880528474,"sku":"BWCS-IB1400HB-2","price":93.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410880561242,"sku":"BWCS-IB1400HB-3","price":104.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IB1400HB-big.webp?v=1779581443","url":"https:\/\/batteryweb.com\/products\/ibm-thinkpad-i1400-replacement-battery-96v-4500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}