{"product_id":"mobistel-cynus-t5-replacement-battery-37v-1700mah-li-ion","title":"BTY26182 Mobistel Cynus T5 Compatible Battery 3.7V 1700mAh","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, 1700mAh Li-ion replacement battery for the Mobistel Cynus T5 smartphone. It also fits the MT-9201w, MT-9201b, and MT-9201S variants. OEM part number BTY26182 confirms fitment across the full MT-9201 line.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMT-9201 variant coverage:\u003c\/strong\u003e\n    The w, b, and S suffixes denote colour and regional variants — the board layout, connector pinout, and BMS handshake are identical across all three. One cell spec covers the entire line.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an MT-9201 board. The BMS accepted the cell without error flags, and the charge IC reached full cutoff at the correct 4.2V terminal voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for the first full discharge-charge cycle after fitting this cell. The fuel gauge IC calibrates its coulomb counter against the new cell's discharge curve — running a high-current charge into an uncalibrated cell causes erratic percentage readings for weeks.\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 a model of the cell's discharge curve over several cycles. When you fit a new cell, the IC is still running the old model. It will misread state-of-charge, often reporting full at 4.05V or jumping erratically in the 40–60% range. One complete discharge to shutdown and a slow, uninterrupted charge to 4.2V forces the IC to rebuild its curve against the new cell. After two full cycles, percentage reporting stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff problem, not a capacity fault. Under modem or display load, the cell voltage drops sharply below what the IC predicted at that percentage, triggering an emergency cutoff. It happens most often when the fuel gauge IC hasn't completed calibration on the new cell. Run two full slow-charge cycles, then check if shutdowns persist. If the phone still cuts out under load, confirm resting cell voltage reads above 3.7V after a 30-minute rest off charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404308021338,"sku":"BWCS-MCT500SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404308054106,"sku":"BWCS-MCT500SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404308086874,"sku":"BWCS-MCT500SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MCT500SL-1.webp?v=1779369735","url":"https:\/\/batteryweb.com\/products\/mobistel-cynus-t5-replacement-battery-37v-1700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}