{"product_id":"grundig-mpixx-8000-replacement-battery-37v-1050mah-li-polymer","title":"Grundig MPixx 8000 Replacement Battery 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGrundig MPixx 8000 Series — 3.7V Li-Polymer Replacement Battery (YK503450PL 1S1P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1050mAh lithium-polymer cell replaces the original battery in the Grundig MPixx 8000, MPixx 8400, and MPixx 8800 portable media players. The YK503450PL 1S1P matches the physical footprint at 51.80 × 32.85 × 5.40mm and the connector pinout of the factory cell. Capacity is 1050mAh (3.89Wh), identical to the OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMPixx 8000, 8400, and 8800 compatibility:\u003c\/strong\u003e\n    All three models share the same single-cell 3.7V battery bay, connector orientation, and BMS handshake logic, so one cell fits the entire range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an MPixx 8000 unit. The BMS accepted the cell without fault codes, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Connect the player to its charger immediately after fitting the new cell and leave it for a full uninterrupted charge before first use. Media players frequently enter a deep-discharge protection state when a fresh cell is installed at resting voltage, and a continuous charge cycle clears this state before normal use begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping after cell swap on the MPixx series\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MPixx firmware reads battery state through a voltage-threshold lookup table stored in firmware, not a coulomb counter. After fitting a new cell, the player has no reference data for the new cell's discharge curve, so the percentage indicator recalibrates over the first few charge cycles. Expect erratic jumps — typically between 20% and 80% — for the first two or three full cycles. Run the player from a full charge down to automatic shutdown, then recharge fully, and the indicator stabilises. By cycle three, readings should track within roughly 10% of actual remaining capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cuts out before the battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe audio amplifier inside the MPixx draws a brief current spike to drive headphone output, particularly at higher volume levels. Near the end of a cell's discharge curve, battery voltage sags under this load and can dip below the BMS protection cutoff — even when the indicator still shows charge remaining. The device shuts down to protect the cell, not because the indicator is accurate. To push past this, reduce playback volume in the final 15–20% of charge; lower amplifier draw reduces the voltage sag and delays the cutoff trip. If the issue appears early in the cell's life, check that the terminal voltage under load stays above 3.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381334835290,"sku":"BWCS-GMP800SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381334868058,"sku":"BWCS-GMP800SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381334900826,"sku":"BWCS-GMP800SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GMP800SL-1.webp?v=1778899987","url":"https:\/\/batteryweb.com\/products\/grundig-mpixx-8000-replacement-battery-37v-1050mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}