{"product_id":"lenovo-ideapad-duet-5-12iru8-83b3001hph-replacement-battery-1544v-3150mah-li-polymer","title":"Lenovo IdeaPad Duet 5 L21C4PE3 Replacement Battery 15.44V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo IdeaPad Duet 5 12IRU8 \/ 12IAU7 — 15.44V Li-Polymer Replacement Battery (L21C4PE3)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.44V, 3150mAh (48.64Wh) Li-Polymer battery for the Lenovo IdeaPad Duet 5 12-inch hybrid tablet-laptop. It replaces OEM part numbers L21C4PE3, L21D4PE3, and L21L4PE3 across the 12IRU8 and 12IAU7 series. The flat 5.20mm profile fits the slim detachable chassis without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e12IRU8 and 12IAU7 coverage:\u003c\/strong\u003e\n    Both series use the same 15.44V four-cell Li-Polymer configuration, identical connector pinout, and the same BMS handshake protocol — so one cell fits the full range of Duet 5 variants listed above.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Duet 5 chassis and confirmed the BMS negotiated charge termination correctly at 15.44V. The fuel gauge IC communicated without error flags across the full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle recalibration after swap:\u003c\/strong\u003e\n    After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDuet 5 shutting down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe IdeaPad Duet 5 runs a combined CPU and display load that draws hard on the cell during intensive tasks. A new cell's EEPROM data has not yet synced with the BIOS fuel gauge IC, so the reported state-of-charge drifts badly in the first few cycles. The system reads a false low-voltage floor and triggers a protective shutdown before the cell is actually empty. Run two to three full discharge-to-hibernate and full-recharge cycles — the voltage floor recalibrates and shutdowns at false 20–30% stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data from the EEPROM on the old or replacement cell, not from a live capacity test. A freshly swapped cell carries factory EEPROM values that don't match the learned data the BIOS was expecting from the original unit, so it flags \"poor health\" or shows 0% on first boot. This is a data mismatch, not a fault with the replacement cell. Run the battery learn cycle — full discharge to hibernate-cutoff, full uninterrupted charge to 100% — and the BIOS will rewrite its health register against the new cell's actual values.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409548083290,"sku":"BWCS-LVD512NB-1","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409548116058,"sku":"BWCS-LVD512NB-2","price":111.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409548148826,"sku":"BWCS-LVD512NB-3","price":124.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVD512NB-1.webp?v=1779579986","url":"https:\/\/batteryweb.com\/products\/lenovo-ideapad-duet-5-12iru8-83b3001hph-replacement-battery-1544v-3150mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}