{"product_id":"lg-p970-replacement-battery-37v-1200mah-li-ion","title":"LG Optimus Black P970 Replacement Battery 3.7V 1200mAh BL-44JN","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG Optimus Black P970 — 3.7V Li-ion Replacement Battery (BL-44JN)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-ion cell built to the BL-44JN specification. It fits the LG Optimus Black P970, VS700, P690, and over 60 additional LG handsets that share the same battery bay and connector. Voltage and capacity match the original factory spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP970 \/ VS700 \/ P690 platform fit:\u003c\/strong\u003e\n    These models share the same 64.50 × 44.40 × 4.50mm cell footprint, 3.7V nominal rail, and contact pad layout. One BL-44JN cell covers all of them without any modification to the bay or connector tab.\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 P970 unit. The BMS accepted the cell without error flags, charge termination triggered correctly at 4.2V, and low-voltage cutoff engaged at the expected threshold rather than tripping early.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    After fitting this cell, run one complete discharge to automatic shutdown followed by a full uninterrupted charge before using the device normally. This gives the onboard fuel gauge IC a clean reference curve for the new cell — skipping this step causes erratic percentage readings for the first several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the P970 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe P970 uses a fuel gauge IC that tracks charge state by counting coulombs against a stored discharge curve from the original cell. A new cell has a slightly different internal resistance and discharge profile. Until the IC maps one full cycle against the new cell, the percentage readout interpolates against stale data. One full discharge-to-shutdown followed by a complete charge resets the reference point and brings the percentage display back in line.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem or display draws a short high-current burst and the cell voltage dips below the BMS cutoff threshold — even though the reported state of charge still shows 20–30%. It is a fuel gauge calibration lag, not a faulty cell. The fuel gauge has not yet learned where the actual voltage cliff sits on this cell's discharge curve. Run the device through one or two full discharge-charge cycles and the shutdowns will stop as the IC corrects its low-voltage estimate. If shutdowns continue after three full cycles, check that charge termination is reaching 4.20V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405088981082,"sku":"BWCS-LKP970SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405089013850,"sku":"BWCS-LKP970SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405089046618,"sku":"BWCS-LKP970SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LKP970SL-1.webp?v=1779369956","url":"https:\/\/batteryweb.com\/products\/lg-p970-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}