{"product_id":"base-lutea-2-replacement-battery-37v-1100mah-li-ion","title":"BASE Lutea 2 Replacement Battery 3.7V 1100mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBASE Lutea 2 — 3.7V Li-ion 1100mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh lithium-ion cell for the BASE Lutea 2 smartphone. It replaces the original battery when the phone no longer holds charge or shuts down unexpectedly. Swap it in when the existing cell has degraded past usable capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLutea 2 cell fit:\u003c\/strong\u003e\n    The Lutea 2 uses a compact 84 x 34 x 4mm cell at 3.7V nominal. This replacement matches those physical and electrical parameters exactly — same connector position, same charge termination voltage the phone's charge IC expects at 4.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the bench and confirmed the BMS communicates cleanly with the phone. The fuel gauge IC accepted the new cell without throwing a fault on the charge controller.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge reset:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. This gives the Lutea 2's coulomb counter a clean reference curve for the new cell and prevents early percentage-reading drift.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Lutea 2 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Lutea 2 uses a fuel gauge IC that builds its capacity model from the discharge curve of the cell it learned on — typically the original factory cell. When you install a replacement, the IC still references that old curve. Until it recalibrates, it can report 40% remaining when the cell is actually at 15%. One full discharge-to-shutdown followed by a full uninterrupted charge corrects the reference. After that cycle, percentage readings stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Lutea 2 after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure, not a capacity problem. Under load — modem transmitting, screen at full brightness — the cell voltage drops sharply below the 3.4V threshold the phone's protection circuit uses as its cutoff. A new cell with an uncalibrated fuel gauge makes this worse because the phone does not know real state-of-charge. If this occurs, run that first full discharge cycle. If shutdowns persist below 3.5V under load after two full cycles, the cell has a high internal resistance issue — check charge current is reaching at least 500mA during the charge phase.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405074333786,"sku":"BWCS-ZTV900SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405074366554,"sku":"BWCS-ZTV900SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405074399322,"sku":"BWCS-ZTV900SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTV900SL-1.webp?v=1779369935","url":"https:\/\/batteryweb.com\/products\/base-lutea-2-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}