{"product_id":"blackberry-key2-replacement-battery-385v-3300mah-li-polymer","title":"BlackBerry KEY2 TLp035B1 Replacement Battery 3.85V 3300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBlackBerry KEY2 — 3.85V Li-Polymer Replacement Battery (TLp035B1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3300mAh, 3.85V lithium-polymer cell built to replace the original TLp035B1 battery in the BlackBerry KEY2. It fits the BBF100-6, BBF100-8, BBF100-9, and related KEY2 variants. Rated at 12.71Wh, it powers the display, processor, modem, and wireless radios across normal daily use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKEY2 variant compatibility:\u003c\/strong\u003e\n    The BBF100-6, BBF100-8, and BBF100-9 share the same physical cell footprint, connector pinout, and BMS handshake protocol. One battery fits all three without adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through a full charge cycle on a KEY2 BBF100-6. The BMS accepted the charge current without fault, voltage held steady at 3.85V nominal, and the thermal regulation circuit logged no cutoff events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. The KEY2's fuel gauge IC calibrates its coulomb counter against the new cell's discharge curve — skipping this step leaves the percentage reading inaccurate until it self-corrects over several days.\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 KEY2 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure, not a capacity problem. Under modem transmit load or screen-on peaks, the new cell briefly drops below the BMS cutoff threshold even when the fuel gauge still reads 20–30%. The fuel gauge IC is still calibrated to the old cell's internal resistance profile, so it overestimates remaining charge. One full discharge to 3.0V followed by a complete charge at standard rate resets the reference curve and closes the gap between reported and actual state of charge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not working on first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, the KEY2's charge IC may not negotiate fast charging on the first cycle. The new BMS presents a higher impedance than a conditioned cell, and the charge controller defaults to standard 5V input until it completes one full baseline cycle. Charge the phone at standard rate through a complete cycle first — voltage should stabilise at 4.35V at full charge. Fast charging resumes normally on the second cycle once the charge IC accepts the new cell's impedance signature.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391999967322,"sku":"BWCS-BRK200SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392000000090,"sku":"BWCS-BRK200SL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392000032858,"sku":"BWCS-BRK200SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BRK200SL-1.webp?v=1779142855","url":"https:\/\/batteryweb.com\/products\/blackberry-key2-replacement-battery-385v-3300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}