{"product_id":"benq-t60-replacement-battery-37v-550mah-li-ion","title":"BenQ T60 Replacement Battery 3.7V 550mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBenQ T60 \/ 228 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 550mAh Li-ion cell for the BenQ T60 and 228 candybar mobile phones. It slots into the original battery bay and connects to the same three-contact terminal. Capacity matches the factory spec at 550mAh (2.04Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT60 and 228 shared platform:\u003c\/strong\u003e\n    Both models run on the same baseband hardware and draw from an identical battery bay geometry, connector pitch, and voltage rail. One cell covers both.\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 a T60 unit. The BMS accepted the charge profile without fault flags, and voltage held above 3.5V through the discharge curve until the low-voltage cutoff triggered cleanly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to auto-off, then charge uninterrupted to 100% before normal use. The T60's fuel gauge IC was calibrated to the original cell's discharge curve — skipping this step causes the percentage counter to read from stale data and show inaccurate figures.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the BenQ T60\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eEarly 2000s candybar phones like the T60 use a simple fuel gauge IC with no active coulomb counter. When an aged or new uncalibrated cell hits a voltage cliff — typically around 3.6V under the load of an active call or backlight — the IC interprets it as a valid low-voltage cutoff and shuts the phone down, even though the reported percentage still shows 20–30%. This is not a cell fault. It means the fuel gauge has not yet mapped the new cell's actual discharge curve. Run one complete discharge cycle to auto-off, then charge fully. After that cycle, the IC tracks voltage more accurately and the early shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells stored without charge self-discharge below 2.5V per cell over time. At that level, the BMS locks out to prevent damage to the chemistry. The T60 will show no sign of life — no boot screen, no charging indicator. Connect to a charger and leave it for 15–20 minutes before pressing the power button. Most BMS circuits on cells at this voltage level need a trickle pre-charge phase to recover to 2.9V before they release the lockout and allow normal charging current to flow.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405072826458,"sku":"BWCS-ZTF228SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405072859226,"sku":"BWCS-ZTF228SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405072891994,"sku":"BWCS-ZTF228SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTF228SL-1.webp?v=1779369935","url":"https:\/\/batteryweb.com\/products\/benq-t60-replacement-battery-37v-550mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}