{"product_id":"alcatel-ot-500-replacement-battery-37v-900mah-li-ion","title":"Alcatel OT-500 Compatible Battery 3.7V 900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcatel OT-500 \/ OT-501 \/ OT-700 \/ OT-701 Series — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 900mAh Li-ion cell for the Alcatel OT-500, OT-501, OT-700, OT-701, and eight additional OT-series models that share the same battery bay and connector. It replaces the original cell when the phone no longer holds a usable charge through a normal day. Capacity is 900mAh (3.33Wh) — matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOT-500 and OT-700 platform compatibility:\u003c\/strong\u003e\n    These models share a common battery footprint, connector pinout, and charge IC handshake across both the 500 and 700 sub-families. The cell slots into all listed variants 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 OT-series hardware. The BMS accepted the charge IC handshake cleanly, held voltage above 3.5V under normal call and screen load, and hit the low-voltage cutoff without tripping an early protection event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to automatic shutdown, then charge uninterrupted to 100% before normal use. The OT-series fuel gauge IC references the old cell's discharge curve — one complete cycle overwrites it with the new cell's profile.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the OT-500 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe OT-series uses a simple coulomb-counting fuel gauge that calibrates against the specific discharge curve of the installed cell. When you fit a new cell, the gauge still references the previous cell's learned curve. This mismatch causes the percentage to read high, then drop suddenly — not because the cell is faulty, but because the gauge has no valid reference data yet. One full discharge-to-cutoff followed by a complete uninterrupted charge resets the reference and restores accurate reporting.\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 cell voltage drops sharply under the load of an active call or backlight — a voltage cliff that the gauge reads as 20–30% remaining but the BMS reads as a protection threshold breach. On a new cell that hasn't been calibrated, the fuel gauge cannot predict this cliff accurately. The fix is the same full-cycle calibration: discharge completely to auto-shutdown, then charge to 100%. After that cycle, the gauge knows where the voltage cliff sits and the OS percentage will track it correctly, stopping the unexpected cutoff.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409460559962,"sku":"BWCS-OT500SL-1","price":22.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409460592730,"sku":"BWCS-OT500SL-2","price":25.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409460625498,"sku":"BWCS-OT500SL-3","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OT500SL-big.webp?v=1779579767","url":"https:\/\/batteryweb.com\/products\/alcatel-ot-500-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}