{"product_id":"nokia-105-4g-2023-replacement-battery-37v-1000mah-li-ion","title":"Nokia 105 4G Compatible Battery 3.7V 1000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia 105 4G (2023) — 3.7V Li-ion 1000mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-ion replacement battery for the Nokia 105 4G (2023) and Nokia 105 (2023) mobile phones. It also covers the older Nokia 1100 and 1101 models that share the same cell footprint and connector pinout. Capacity is 1000mAh at 3.7V nominal — match the original spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNokia 105 4G (2023) and 105 (2023) compatibility:\u003c\/strong\u003e\n    These two models share the same battery bay dimensions, PCB connector, and BMS communication protocol — the fuel gauge IC on each device reads the same cell chemistry signature, so no firmware mismatch on swap.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through three full charge-discharge cycles on a Nokia 105 4G (2023) unit. The BMS accepted the cell on first connection, charge termination triggered correctly at 4.2V, and the protection circuit tripped cleanly on over-discharge test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before any high-current charging pushes current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nokia 105 4G reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual cell chemistry. The IC then reports percentage based on stale data — you may see 80% drop to 30% without warning, or the percentage count down faster than real capacity justifies. One full discharge to auto-off followed by an uninterrupted full charge resets the coulomb counter against the new cell and restores accurate reporting.\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 cell voltage drops sharply under load — specifically when the 4G modem transmits or the screen wakes from standby. At that load spike, a partially discharged cell dips below the BMS cutoff threshold even though the fuel gauge still shows charge remaining. The reported percentage and the actual cell voltage are out of sync. Complete two full discharge-charge cycles without interruption and verify that the cell holds above 3.6V under load before the gauge reads below 20%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409497784410,"sku":"BWCS-NK5CMX-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409497817178,"sku":"BWCS-NK5CMX-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409497849946,"sku":"BWCS-NK5CMX-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK5CMX-1.webp?v=1779579814","url":"https:\/\/batteryweb.com\/products\/nokia-105-4g-2023-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}