{"product_id":"nokia-2330-replacement-battery-37v-900mah-li-ion","title":"Nokia BL-5S 2330 Replacement Battery 3.7V 900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia 2330 \/ 2330 Classic — 3.7V Li-ion Replacement Battery (BL-5S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 900mAh Li-ion cell built to the BL-5S specification for the Nokia 2330 and 2330 Classic. Both are compact candybar phones from the mid-2000s that share the same battery bay dimensions and connector. The original BL-5S degrades over charge cycles, and this unit replaces it directly at the same voltage and capacity rating.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2330 and 2330 Classic compatibility:\u003c\/strong\u003e\n    Both models use the identical BL-5S form factor — same 49.99 × 37.93 × 5.27mm footprint, same three-contact connector, same 3.7V nominal rail. No adapter or modification needed to fit either variant.\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 runs on the 2330 platform. The BMS held the charge cutoff correctly at 4.2V and the low-voltage protection tripped cleanly before the cell dropped below 3.0V under load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, run one complete discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. The phone's fuel gauge IC was calibrated to the old cell's discharge curve and needs a full cycle against the new cell to report percentage accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 2330 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nokia 2330 tracks charge state using a simple fuel gauge IC that builds its percentage model from historical discharge data on the previous cell. When you install a fresh BL-5S, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship. The phone may show 50% and shut down moments later, or sit at 100% long after it should have dropped. One full discharge-to-shutdown followed by a complete uninterrupted charge resets the reference points the gauge uses. After that cycle, percentage readings stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 15–25% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under the load of an outgoing call or backlight activation — a voltage cliff the fuel gauge doesn't anticipate. The phone's protection circuit reads the sag as a critical low-voltage event and cuts power before the displayed percentage reaches zero. It is not a fault with the cell itself; it is the gauge firing on a voltage threshold rather than a capacity threshold. Charge the phone to 100%, then let it discharge naturally through normal use for two full cycles — by the second cycle the gauge IC has enough data to predict the sag and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405121093722,"sku":"BWCS-NK5SSL-1","price":20.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405121126490,"sku":"BWCS-NK5SSL-2","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405121159258,"sku":"BWCS-NK5SSL-3","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK5SSL-1.webp?v=1779369992","url":"https:\/\/batteryweb.com\/products\/nokia-2330-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}