{"product_id":"nokia-tesla-replacement-battery-38v-2200mah-li-ion","title":"Nokia BV-L4A Tesla Replacement Battery 3.8V 2200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia Tesla \/ RM-1141 — 3.8V Li-ion Replacement Battery (BV-L4A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2200mAh Li-ion replacement battery for the Nokia Tesla (RM-1141). It fits the original BV-L4A slot and restores full calling, messaging, and app function to devices where the original cell has degraded or failed to hold charge. Capacity is 2200mAh — matching OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTesla \/ RM-1141 fitment:\u003c\/strong\u003e\n    Both model identifiers reference the same hardware platform. The BV-L4A connector, cell dimensions (65.05 × 60.15 × 4.60mm), and 3.8V nominal rail are shared across the Tesla and RM-1141 variant — the BMS handshake and charge IC expect identical parameters from both.\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 load discharge on the Tesla platform. The BMS accepted the cell without error flags, and the charge IC stepped through constant-current and constant-voltage phases cleanly at standard 5V input.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After fitting this battery, disable fast charging and run one complete discharge-charge cycle at standard speed. The fuel gauge IC recalibrates its coulomb counter against the new cell's discharge curve — skipping this step often causes erratic percentage readings in the first few days of use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Nokia Tesla after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity problem. The fuel gauge IC still references the old cell's discharge profile, so it reports 25% remaining while the actual cell voltage has already dropped below the modem and screen load threshold. Under high-draw moments — active call, screen-on, LTE ping — voltage collapses faster than the gauge expects and the device shuts off as a protective measure. One full discharge-charge cycle at standard charge speed forces the coulomb counter to re-anchor to the new cell's actual voltage curve, and the phantom shutdowns typically stop after that cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNokia Tesla not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage, and if the BV-L4A shipped or sat unused long enough, cell voltage can drop below 2.5V — the threshold where the BMS enters lockout to prevent deep-discharge damage. In lockout, the phone shows no charging indicator and will not boot. Connect the device to a low-current 5V charger and leave it for 20–30 minutes without pressing the power button — the charge IC trickle-charges the cell from below 2.5V up to the recovery threshold, after which normal charging resumes. Once the screen shows a charge indicator, let it reach at least 3.6V before powering on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404219875418,"sku":"BWCS-NK830SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404219908186,"sku":"BWCS-NK830SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404219940954,"sku":"BWCS-NK830SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK830SL-1.webp?v=1779369425","url":"https:\/\/batteryweb.com\/products\/nokia-tesla-replacement-battery-38v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}