{"product_id":"myphone-c-smart-replacement-battery-37v-1500mah-li-ion","title":"MyPhone C-Smart BM-03 Compatible Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMyPhone C-Smart \/ Funky — 3.7V Li-ion Replacement Battery (BM-03)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-ion battery carrying OEM part number BM-03. It fits the MyPhone C-Smart and Funky smartphones. It replaces the original cell when capacity has dropped and the phone no longer holds a useful charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eC-Smart and Funky compatibility:\u003c\/strong\u003e\n    Both models use the same battery bay dimensions, voltage rail, and BMS connector pinout. The BM-03 cell measures 57.30 × 54.05 × 4.60mm — a physical fit that matches both devices without modification.\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 C-Smart platform. The BMS accepted the cell, completed a full charge without interruption, and held voltage above the low-battery cutoff threshold through the discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — preventing erratic percentage readings from the first day.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on a replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff, not a capacity problem. When the modem transmits or the screen peaks in brightness, current draw spikes sharply. A new cell with an uncalibrated fuel gauge IC can report 25% remaining while actual cell voltage has already dropped below the 3.2V cutoff threshold. The BMS trips, and the phone shuts off before the percentage reaches zero. One full discharge-charge cycle without fast charging recalibrates the coulomb counter and eliminates this behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells that discharge below approximately 2.5V per cell trigger a BMS lockout — the protection circuit opens and blocks current to prevent damage. Plugging in the charger may show nothing on screen for several minutes. Leave the phone connected to a wall charger, not a USB port, for at least 20–30 minutes without pressing the power button. Once the cell recovers above the BMS re-enable threshold, the phone will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392101810266,"sku":"BWCS-MYC300SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392101843034,"sku":"BWCS-MYC300SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392101875802,"sku":"BWCS-MYC300SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MYC300SL-1.webp?v=1779143816","url":"https:\/\/batteryweb.com\/products\/myphone-c-smart-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}