{"product_id":"wintec-wbt-202-replacement-battery-37v-1200mah-li-ion","title":"Wintec WBT-202 Replacement Battery 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWintec WBT-202 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-ion replacement battery for the Wintec WBT-202 smartphone. It fits directly into the WBT-202 and restores power to devices where the original cell has degraded or failed to hold charge. Capacity is 4.44Wh at the rated 3.7V nominal voltage.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWBT-202 fit:\u003c\/strong\u003e\n    The WBT-202 uses a slim 53.00 × 33.90 × 5.70mm cell format. This replacement matches those physical dimensions and the 3.7V voltage rail the device's charge IC expects. No connector modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the bench. The BMS held cutoff correctly at both ends — no overcharge trip, no premature low-voltage lockout. Charge IC handshake completed on first connection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after installation:\u003c\/strong\u003e\n    On first use after fitting this battery, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC build an accurate discharge curve for the new cell before high-current charging begins on an uncalibrated state-of-charge map.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the WBT-202 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WBT-202 uses a coulomb counter or fuel gauge IC that builds its state-of-charge model against the original cell's discharge curve. When a new cell goes in, that stored curve no longer matches the actual cell chemistry. The phone reads voltage and maps it to the old curve, which produces percentage readings that drift or sit higher than reality. One full slow discharge to auto-off, followed by a full uninterrupted charge, forces the IC to recalibrate against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the WBT-202 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is miscalibrated and the reported percentage is ahead of the real state of charge. As the modem or display pulls a load spike, cell voltage drops below the BMS cutoff threshold — around 3.0V — even though the screen shows 20–30% remaining. The phone shuts down to protect the cell. Run one full slow discharge-charge cycle after fitting the new battery. Once the fuel gauge recalibrates, the percentage reading will track real voltage and the sudden shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405033504858,"sku":"BWCS-NK5CHL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405033537626,"sku":"BWCS-NK5CHL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405033570394,"sku":"BWCS-NK5CHL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK5CHL-1.webp?v=1779369842","url":"https:\/\/batteryweb.com\/products\/wintec-wbt-202-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}