{"product_id":"brondi-luxury-5-replacement-battery-38v-1800mah-li-ion","title":"Brondi Luxury 5 Replacement Battery 3.8V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBrondi Luxury 5 — 3.8V Li-ion 1800mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V Li-ion cell rated at 1800mAh (6.84Wh), built to fit the Brondi Luxury 5 mobile phone. It replaces the original cell when capacity fade makes the phone unreliable through a full day of calls and messaging. Dimensions are 59.50 × 47.93 × 5.10 mm — confirm these against your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrondi Luxury 5 fit:\u003c\/strong\u003e\n    The Luxury 5 uses a removable cell on a straightforward connector. No BMS handshake or proprietary authentication is required, so the phone accepts a replacement cell without firmware rejection on power-up.\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. The BMS held the 3.8V nominal rail cleanly under simulated call and screen-on load, with cutoff triggering correctly at the low-voltage threshold rather than shutting the phone mid-use.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first install, disable any fast-charge option and run one full discharge-to-charge cycle at standard rate. This lets the phone's fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging is applied to 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 Brondi Luxury 5 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe phone's fuel gauge IC stores a discharge curve from the original cell. When a new cell goes in, the stored curve no longer matches the actual cell chemistry, so the percentage display drifts — often reading higher than the real state of charge. The fix is one complete discharge-charge cycle at standard current. After that cycle, the coulomb counter recalibrates and the percentage readout tracks the new cell accurately from around 3.6V down to the cutoff threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Luxury 5 after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the fuel gauge IC is still running the old cell's voltage-to-percentage map. The new cell hits a voltage cliff — where internal resistance causes a fast voltage drop under the load of an active call or backlight — before the gauge registers critical. The phone's protection circuit reads the voltage drop as a hard cutoff condition and shuts down instantly. Run one full calibration cycle first; if shutdowns persist after that, check that the cell connector is fully seated, since a loose contact raises effective impedance and worsens voltage sag under load. Target a resting voltage of 3.8V on a full charge to confirm the cell is performing within spec.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404144476250,"sku":"BWCS-ZTQ507SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404144509018,"sku":"BWCS-ZTQ507SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404144541786,"sku":"BWCS-ZTQ507SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTQ507SL-1.webp?v=1779369095","url":"https:\/\/batteryweb.com\/products\/brondi-luxury-5-replacement-battery-38v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}