{"product_id":"hp-presario-cq62-100-replacement-battery-3v-200mah-lithium","title":"HP Presario CQ62-100 CMOS Replacement Battery 3V 200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Presario CQ62-100 Series — 3V Lithium Replacement Battery (GC02000KJ00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V 200mAh lithium CMOS backup battery for the HP Presario CQ62-100 series laptop. It replaces OEM part GC02000KJ00 and sits on the motherboard to power the RTC circuit and retain BIOS settings when mains power is removed. Without a functioning cell, the clock resets and stored configuration is lost every time the laptop is unplugged.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCQ62 series compatibility:\u003c\/strong\u003e\n    The CQ62-100 through CQ62-103TU and 149 additional variants share the same motherboard CMOS socket, connector footprint, and 3V retention voltage requirement. One cell fits the full production run of this chassis.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We verified the cell holds above the 2.8V minimum retention threshold under no-load and confirmed the BMS handoff to the RTC circuit remained stable after a full power cycle with mains disconnected.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install clock correction:\u003c\/strong\u003e\n    After fitting the new cell, enter BIOS immediately and set the correct date and time, then save and exit. The RTC circuit loses its reference during the swap, so any power interruption resets the clock to a default value that must be manually corrected after the swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS clock resetting to 2000 after every power cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe RTC circuit in the CQ62 draws continuously from the CMOS cell to maintain the clock while mains power is absent. When the cell voltage drops below 2.8V, the SRAM loses retention voltage and the clock defaults to a hardcoded date — typically January 1, 2000. Setting the correct time in BIOS only holds until the next full power-down because the depleted cell cannot sustain the circuit. Replacing the cell is the only fix; the RTC cannot draw from the main battery pack once it drops below threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error on boot after fitting a new coin cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error after a new cell install usually means the BIOS detected a mismatch between stored settings and the cleared SRAM — not a fault with the new cell itself. When the old cell was fully depleted, BIOS settings were lost entirely, and the new cell simply powered up a blank SRAM state. Enter BIOS setup, confirm or re-enter your settings, then save and exit. The checksum error clears once BIOS writes a valid configuration back to SRAM at the correct retention voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339847336026,"sku":"BWCS-HCQ620BU-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339847368794,"sku":"BWCS-HCQ620BU-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339847401562,"sku":"BWCS-HCQ620BU-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HCQ620BU-1.webp?v=1778366843","url":"https:\/\/batteryweb.com\/products\/hp-presario-cq62-100-replacement-battery-3v-200mah-lithium","provider":"BatteryWeb","version":"1.0","type":"link"}