{"product_id":"mitel-replacement-battery-148v-4400mah-li-ion","title":"Mitel CGR-BT19SE-MSL 14.8V Replacement Laptop Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMitel CGR-BT19SE-MSL — 14.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 4400mAh (65.12Wh) Li-ion battery carrying OEM part number CGR-BT19SE-MSL. It fits compatible Mitel notebook and laptop computers where the original cell has degraded or failed. Voltage and capacity match the original specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e14.8V four-cell series configuration:\u003c\/strong\u003e\n    Mitel notebooks in this line run a 4S Li-ion pack at 14.8V nominal. The BMS on the motherboard validates cell count and voltage signature at boot — a mismatch will trigger an immediate \"unknown battery\" flag and block charging entirely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, full-load discharge, and BMS handshake verification. The protection circuit responded correctly to overvoltage and over-discharge thresholds, and the fuel gauge IC accepted calibration without faulting.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle recalibration on Mitel laptops:\u003c\/strong\u003e\n    After fitting this battery, run the laptop down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This forces the BIOS learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data from EEPROM registers that were written by the original cell during its lifespan. When a new cell is installed, those registers still contain the degraded cell's values — so the system flags poor health before the new battery has run a single cycle. This is a data mismatch, not a battery fault. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%. After that cycle, the BIOS recalculates health against the new cell and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The displayed percentage is based on stale data from the previous cell, so the voltage cliff arrives earlier than the gauge predicts. Under combined CPU and display load, the cell voltage drops below the BMS cutoff threshold while the OS still shows charge remaining. Run two full discharge-to-hibernate cycles and the fuel gauge IC will remap its curve — shutdowns at false percentages stop once calibration is complete.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410828296282,"sku":"BWCS-MT8630NB-1","price":80.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410828329050,"sku":"BWCS-MT8630NB-2","price":93.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410828361818,"sku":"BWCS-MT8630NB-3","price":104.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MT8630NB-big.webp?v=1779581286","url":"https:\/\/batteryweb.com\/products\/mitel-replacement-battery-148v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}