{"product_id":"tcl-a986-replacement-battery-37v-1650mah-li-ion","title":"TCL A986 Replacement Battery 3.7V 1650mAh CAB32A0001C1","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTCL A986 \/ S600 \/ A980 \/ S500 — 3.7V Li-ion Replacement Battery (CAB32A0001C1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1650mAh (6.11Wh) lithium-ion replacement battery for TCL smartphones including the A986, S600, A980, and S500. It uses OEM part numbers CAB32A0001C1, TLiB5AB, and CAB1500007C1. Swap it in when the original cell no longer holds charge or the phone shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA986, S600, A980, S500 compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, connector pinout, and BMS handshake requirements. One cell fits all four because the charge IC and fuel gauge IC communicate over the same protocol across this TCL platform.\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 TCL platform, confirmed BMS negotiation completed without fault codes, and verified the fuel gauge IC accepted the new cell's discharge curve without triggering a protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge caution:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TCL A986 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on these TCL devices uses a coulomb counter that was calibrated to the original cell's specific discharge curve. When you install a new cell, that learned curve no longer matches the new cell's actual voltage-versus-capacity relationship. The result is percentage readings that can be off by 10–20%, with the phone sometimes jumping from 30% to shutdown without warning. One full discharge cycle down to auto-off followed by a full charge to 100% forces the IC to rebuild its reference curve against the new cell.\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 issue, not a capacity problem. Under peak load — active LTE, screen at full brightness, or a background sync burst — the cell voltage drops sharply below the protection threshold even when the reported percentage looks healthy. The BMS trips to protect the cell and the phone cuts off instantly. If this happens consistently around 20–30%, run one full calibration cycle as described above, then check that shutdown voltage stabilises at or above 3.2V under normal screen-on load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404338790490,"sku":"BWCS-OT918XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404338823258,"sku":"BWCS-OT918XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404338856026,"sku":"BWCS-OT918XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OT918XL-1.webp?v=1779369779","url":"https:\/\/batteryweb.com\/products\/tcl-a986-replacement-battery-37v-1650mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}