{"product_id":"doro-primo-368-replacement-battery-37v-1000mah-li-ion","title":"Doro Primo 368 Replacement Battery RCBNTC05 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoro Primo 368 — 3.7V Li-ion Replacement Battery (RCBNTC05)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-ion replacement battery for the Doro Primo 368 mobile phone. It replaces part number RCBNTC05 and restores power to a phone that no longer holds a charge or fails to turn on. Dimensions are 62.15 x 38.10 x 4.60mm — confirm these against your original cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrimo 368 fitment:\u003c\/strong\u003e\n    The Primo 368 uses a removable cell behind the rear cover. This battery matches the original voltage rail, connector position, and BMS handshake so the phone's charge IC accepts the cell without errors.\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 Primo 368 unit. The BMS negotiated correctly with the charge IC on the first cycle, with no overcharge or thermal cutoff events recorded.\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 any fast-charge mode for one full discharge-charge cycle. This allows the fuel gauge IC to build an accurate discharge curve against the new cell before high-current charging is applied to an uncalibrated system.\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 Primo 368 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still using the discharge curve of the old, degraded cell. The new cell has a different voltage-to-capacity profile, so the IC misreads the state of charge. When load spikes — a call, screen brightness surge, or network scan — the actual cell voltage drops below the shutdown threshold before the gauge reaches zero. One full discharge-charge cycle without interruption resets the coulomb counter and corrects the reported percentage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement battery was left uncharged in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the cell voltage drops below approximately 2.5V, the BMS enters a lockout state to prevent damage and the phone will not respond to the power button. Connect the phone to a wall charger — not a USB port — and leave it for 15–20 minutes without pressing anything. The charge IC will trickle-charge the cell back above the BMS recovery threshold, after which normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391793725530,"sku":"BWCS-DEP368SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391793758298,"sku":"BWCS-DEP368SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391793791066,"sku":"BWCS-DEP368SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP368SL-1.webp?v=1779142035","url":"https:\/\/batteryweb.com\/products\/doro-primo-368-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}