{"product_id":"onn-ona19tb007-replacement-battery-37v-3800mah-li-polymer","title":"ONN ONA19TB007 Tablet Compatible Battery 3.7V 3800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eONN ONA19TB007 \/ ONA19TB003 — 3.7V Li-Polymer Replacement Battery (U2870152P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 3800mAh lithium-polymer battery replaces the U2870152P cell in the ONN ONA19TB007 and ONA19TB003 tablets. It restores power to the display, processor, and wireless radios when the original cell no longer holds a charge or fails to power on the device. Dimensions are 152.00 × 69.00 × 3.00mm — confirm these against your existing cell before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eONA19TB007 and ONA19TB003 compatibility:\u003c\/strong\u003e\n    Both tablets share the same OEM part number U2870152P, voltage rail, and connector pinout. The BMS handshake is identical across both units, so this cell communicates correctly with the charge IC on either board.\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 the ONA19TB007. The BMS accepted charge from the device's charge IC without fault flags, and protection circuits tripped correctly at low-voltage cutoff — no thermal events observed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After installation, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. This gives the fuel gauge IC one full reference cycle against the new cell and clears the inaccurate percentage readings that appear immediately after a battery swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ONA19TB007 shuts down between 15% and 25% remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the display is at full brightness and WiFi is active simultaneously, combined current draw pulls the cell voltage down faster than the fuel gauge IC expects. The tablet's protection circuit sees the voltage drop as a low-voltage event and triggers shutdown — even though the reported percentage still shows charge remaining. This is a calibration mismatch between the fuel gauge and the new cell's discharge curve. Run one full discharge-to-shutoff cycle followed by an uninterrupted charge to 100%, and the shutdowns at 15–25% should stop. If they persist after two full cycles, check that the connector is fully seated and contact resistance at the flex cable is zero.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging unavailable after battery replacement on the ONA19TB003\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome users find the tablet reverts to slow charging after a battery swap. The charge IC needs at least one completed charge cycle with the new cell before it re-negotiates the fast-charge handshake with the adapter. Plug in the original ONN charger — not a third-party cable — and let the tablet charge from near-zero to 100% without interruption. After that cycle completes, fast charging typically resumes. If it does not, verify the adapter output is rated at the correct voltage for the device's charge IC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425831518298,"sku":"BWCS-NAT197SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425831551066,"sku":"BWCS-NAT197SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425831583834,"sku":"BWCS-NAT197SL-3","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NAT197SL-1.webp?v=1779929930","url":"https:\/\/batteryweb.com\/products\/onn-ona19tb007-replacement-battery-37v-3800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}