{"product_id":"mobistel-cynus-t5-replacement-battery-37v-2000mah-li-ion","title":"BTY26182 Mobistel Cynus T5 Replacement Battery 3.7V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMobistel Cynus T5 — 3.7V Li-ion Replacement Battery (BTY26182)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2000mAh Li-ion replacement battery for the Mobistel Cynus T5 smartphone. It fits the MT-9201w, MT-9201b, and MT-9201S variants — all share the same battery bay and connector. Swap this in when the original cell can no longer hold a working charge through a full day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCynus T5 and MT-9201 variants:\u003c\/strong\u003e\n    The MT-9201w, MT-9201b, and MT-9201S use the same PCB layout, connector pitch, and BMS handshake protocol as the standard Cynus T5. One cell covers all four model codes.\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 Cynus T5 platform. The BMS accepted the cell without triggering overcurrent or thermal cutoff flags on the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge reset:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-charge cycle from 100% down to automatic shutdown and back to full. This lets the fuel gauge IC map the new cell's discharge curve before the OS begins drawing on its percentage estimates.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Cynus T5 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Cynus T5 uses a fuel gauge IC that builds its percentage model from the coulomb counter data of the original cell. When you fit a new cell, that calibration is stale — the IC is still reading against the old discharge curve. The phone may show 40% and shut down moments later, or sit at 1% for an extended period. One full uninterrupted discharge-charge cycle resets the coulomb counter and lets the IC relearn the new cell's actual capacity. After that cycle, percentage reporting stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem radio or display backlight draws a current spike the cell cannot sustain at that state of charge. Voltage drops below the BMS cutoff threshold — around 3.0V — and the phone cuts power before the percentage reaches zero. It is not a faulty cell; it is the fuel gauge reporting a percentage that does not match actual usable voltage under load. Run two full discharge-charge cycles so the IC recalibrates, then recheck. If shutdowns persist below 3.2V under load, check that the battery connector is fully seated and making clean contact.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404217876570,"sku":"BWCS-MCT500XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404217909338,"sku":"BWCS-MCT500XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404217942106,"sku":"BWCS-MCT500XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MCT500XL-1.webp?v=1779369391","url":"https:\/\/batteryweb.com\/products\/mobistel-cynus-t5-replacement-battery-37v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}