{"product_id":"asus-eee-transformer-tf101-replacement-battery-3v-40mah-lithium","title":"Asus Eee Transformer TF101 CMOS Battery 3V 40mAh 110410","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Eee Transformer TF101 — 3V Lithium Replacement Battery (110410)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3V, 40mAh lithium cell is the CMOS backup battery for the Asus Eee Transformer TF101 and Eee Pad Transformer series tablets. It powers the RTC circuit and SRAM, keeping system settings, date, and time intact when the tablet is off or disconnected from power. When this cell drops below retention voltage, the tablet loses its clock and configuration on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTF101 and Eee Pad Transformer series fit:\u003c\/strong\u003e\n    These models share the same motherboard RTC circuit and connector layout. The cell uses OEM part numbers 110410, 0623.11, and 1226.11 across production runs — the electrical spec is identical across all variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed the cell holds 3V open-circuit and that the RTC circuit latched correctly after installation. The SRAM retained settings through a full mains-disconnect cycle with no checksum errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation RTC correction:\u003c\/strong\u003e\n    After swapping the cell, enter the tablet's system settings and manually set the correct date and time, then save. The CMOS cell powers the RTC circuit, and any interruption during the swap resets the clock to a default value — this step is required to resync the system clock correctly.\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 a default date after every power cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe RTC circuit on the TF101 motherboard relies on this lithium cell to maintain clock state when main power is absent. Once the cell drops below approximately 2.8V, the SRAM loses retention and the clock reverts to a hardcoded default — typically year 2000 or 2010 depending on firmware. This happens consistently on every cold boot, not intermittently. Replacing the cell and setting the correct date in system settings resolves it permanently.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error on boot after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error after installing a new coin cell usually means the SRAM was completely cleared before the swap — not a fault with the new cell. The firmware detects that stored values no longer match the checksum it expects and flags the error. Navigate into system settings, re-enter date, time, and any custom configuration, then save and reboot. The error clears once the firmware writes a fresh valid checksum to SRAM.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339839406170,"sku":"BWCS-AUF101BU-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339839438938,"sku":"BWCS-AUF101BU-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339839471706,"sku":"BWCS-AUF101BU-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUF101BU-1.webp?v=1778366787","url":"https:\/\/batteryweb.com\/products\/asus-eee-transformer-tf101-replacement-battery-3v-40mah-lithium","provider":"BatteryWeb","version":"1.0","type":"link"}