{"product_id":"lenovo-thinkpad-e14-gen-4amd21eb0037gq-replacement-battery-1152v-4850mah-li-polymer","title":"Lenovo ThinkPad E14 Gen 4 L20C3PD4 11.52V Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad E14 \/ E15 Gen 4 (AMD) — 11.52V Li-Polymer Replacement Battery (L20C3PD4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.52V, 4850mAh (55.87Wh) Li-Polymer cell replaces the original L20C3PD4 battery across the ThinkPad E14 Gen 4 (AMD) and ThinkPad E15 Gen 4 (AMD) series. It fits over 260 confirmed model variants sharing the same voltage rail, connector pinout, and BMS handshake protocol. Physical dimensions are 292.60 × 75.30 × 6.50mm — verify bay clearance before ordering if the chassis has been previously serviced.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE14 \/ E15 Gen 4 AMD platform compatibility:\u003c\/strong\u003e\n    Both chassis share an identical battery bay spec, connector locking tab, and EEPROM handshake requirement. A single cell SKU covers both lines because Lenovo standardised the BMS communication protocol across this AMD generation — the BIOS reads the same register map on both boards.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a ThinkPad E14 Gen 4 (AMD) board. The BMS initialised on first boot, BIOS recognised the cell without error codes, and charge regulation stepped correctly through CC and CV phases to 100%.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on ThinkPad firmware:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to the BIOS hibernate cutoff — do not interrupt it — then charge uninterrupted to 100%. This resets the ThinkPad battery learn cycle and clears the spurious \"poor health\" or low Wh warning that BIOS logs 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\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThinkPad firmware stores learned capacity data from the previous cell in a non-volatile register. When a new cell is installed, the old EEPROM data doesn't auto-clear — the BIOS compares the new cell's reported Wh against the degraded baseline it learned from the worn original, and flags a mismatch as poor health. This is a firmware state issue, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the battery learn cycle to re-run against the new cell's actual chemistry. After two to three full cycles, BIOS health reporting returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on the OS fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell yet — it inherited state-of-charge mapping from the old, degraded battery. Under full CPU plus display load, actual cell voltage drops faster than the uncalibrated gauge predicts, hitting the BIOS low-voltage cutoff while the OS still shows 20–30% remaining. The fix is calibration: let the laptop discharge fully to automatic hibernate, then charge to 100% without interruption — repeat this two to three times. After calibration cycles, the fuel gauge tracks cell voltage accurately and the premature shutdown stops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409645109338,"sku":"BWCS-LVT144NB-1","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409645142106,"sku":"BWCS-LVT144NB-2","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409645174874,"sku":"BWCS-LVT144NB-3","price":118.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVT144NB-1.webp?v=1779580091","url":"https:\/\/batteryweb.com\/products\/lenovo-thinkpad-e14-gen-4amd21eb0037gq-replacement-battery-1152v-4850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}