{"product_id":"wind-blade-replacement-battery-37v-1300mah-li-ion","title":"Wind Blade Smartphone Replacement Battery 3.7V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWind Blade — 3.7V Li-ion 1300mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1300mAh lithium-ion cell for the Wind Blade smartphone. It replaces the original battery when capacity has dropped to the point where the phone no longer holds a usable charge. Dimensions are 43.50 × 47.00 × 6.10mm — verify against your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWind Blade fit:\u003c\/strong\u003e\n    The Blade line uses a compact low-voltage single-cell pack at 3.7V nominal. This cell matches that voltage rail and connector footprint, so the charge IC sees the correct input parameters on first power-up.\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 under load. The BMS held cutoff correctly at both the low-voltage floor and the 4.2V charge ceiling, with no thermal anomalies reported at the charge IC.\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-to-charge cycle. This lets the fuel gauge IC build an accurate discharge curve against the new cell before the charge IC starts pushing higher current into it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Wind Blade reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Blade's fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual cell chemistry and internal resistance. The OS reads state-of-charge from the fuel gauge, not the cell directly, so the percentage shown can be 15–20% off in either direction. One complete discharge below 5% followed by a full charge to 100% resets the coulomb counter and lets the IC re-learn the curve.\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 happens when the phone's modem or display draws a current spike the new cell cannot sustain at that state of charge. Voltage drops momentarily below the BMS protection threshold — around 3.0V — and the BMS cuts output to protect the cell. The OS never sees a graceful shutdown signal, so it logs it as a crash. The fix is the same recalibration cycle: fully discharge the phone until it shuts itself off, then charge uninterrupted to 100% so the fuel gauge IC maps the actual voltage cliff of this specific cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405094617178,"sku":"BWCS-ZTE950SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405094649946,"sku":"BWCS-ZTE950SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405094682714,"sku":"BWCS-ZTE950SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTE950SL-1.webp?v=1779369970","url":"https:\/\/batteryweb.com\/products\/wind-blade-replacement-battery-37v-1300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}