{"product_id":"unistrong-7inch-ruggedized-tablet-replacement-battery-37v-5700mah-li-polymer","title":"UniStrong UG-9LH Replacement Battery 3.7V 5700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUniStrong UG903 7-inch Ruggedized Tablet — 3.7V Li-Polymer Replacement Battery (UG-9LH)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 5700mAh Li-Polymer replacement battery for the UniStrong UG903 7-inch Ruggedized Tablet. It replaces OEM part number UG-9LH when the original cell degrades or no longer holds a charge. At 21.09Wh, it matches the factory energy rating for this platform.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUG903 platform fit:\u003c\/strong\u003e\n    The UG903 uses a single-cell Li-Polymer pack at 3.7V nominal. The BMS on this tablet communicates state-of-charge via a dedicated fuel gauge IC — the connector pinout and cell geometry must match exactly, and this replacement does.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on the UG903 platform. The BMS accepted the cell without fault flags, and the charge IC held a stable taper current into the full-charge threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap fuel gauge reset:\u003c\/strong\u003e\n    After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% without using it. The UG903 fuel gauge IC calibrates against actual cell voltage curves — skipping this step causes the percentage display to drift or jump.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUG903 shutting down at 15–25% battery remaining\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe UG903 runs a high-contrast display alongside GPS and wireless radios simultaneously in the field. Under that combined load, the cell voltage drops sharply near the lower state-of-charge range — faster than the fuel gauge IC expects. The BMS reads this voltage sag as a critically low cell and triggers a protective shutdown before the percentage counter reaches zero. One full discharge-to-shutoff cycle followed by an uninterrupted charge recalibrates the fuel gauge and shifts the shutdown point back to the correct threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not available after battery swap on the UG903\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe UG903 charge controller re-negotiates charging parameters after a new cell is fitted. On the first charge cycle post-swap, the device often defaults to standard charge current while the IC profiles the new cell's internal resistance. This is normal behaviour — not a fault with the replacement battery. Charge the tablet once to 100% at standard rate and fast-charge availability typically restores on the second cycle. If it does not, verify the charge cable supports the required current for the UG903's charge IC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425879031898,"sku":"BWCS-UTG903SL-1","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425879064666,"sku":"BWCS-UTG903SL-2","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425879097434,"sku":"BWCS-UTG903SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-UTG903SL-1.webp?v=1779930025","url":"https:\/\/batteryweb.com\/products\/unistrong-7inch-ruggedized-tablet-replacement-battery-37v-5700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}