{"product_id":"t-com-sinus-wda-replacement-battery-37v-1300mah-li-polymer","title":"T-Com Sinus WDA Replacement Battery LIP1298MIPT 3.7V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Com Sinus WDA — 3.7V Li-Polymer Replacement Battery (LIP1298MIPT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1300mAh Li-Polymer replacement battery for the T-Com Sinus WDA personal digital assistant. It carries OEM part number LIP1298MIPT and fits the Sinus WDA directly. Capacity is 1300mAh (4.81Wh), matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSinus WDA compatibility:\u003c\/strong\u003e\n    The Sinus WDA uses a flat Li-Polymer cell at 3.7V nominal. The LIP1298MIPT format matches the physical bay and the BMS handshake voltage threshold the device expects on boot. No adapters or modifications needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the bench with BMS monitoring active. The protection circuit responded correctly to low-voltage cutoff and over-current conditions without triggering false shutdowns.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRAM data protection before swap:\u003c\/strong\u003e\n    Sync all open files and application state to the host computer before removing the battery. The Sinus WDA stores active session data in volatile RAM powered entirely by the main cell — pulling the battery without syncing will wipe any unsaved data.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Sinus WDA won't boot after a new battery is installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells can leave the warehouse in a partially discharged state due to storage and transport time. The Sinus WDA boot sequence requires a minimum voltage threshold before the processor will initialise. If the cell voltage is too low, the device shows nothing on screen or flashes the power LED once and stops. Connect the device to the charger for at least 30 minutes before attempting the first boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage dropping faster than expected during wireless sync sessions\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Sinus WDA's wireless radio draws significantly more current than the device consumes in standby or basic PDA use. Short, repeated sync sessions with the radio active accelerate voltage sag on the cell, which the fuel gauge reads as faster capacity loss. This is a load pattern effect, not a fault with the battery. Run a full charge cycle before comparing drain rates, and check that background wireless processes are not staying active between syncs.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415946723418,"sku":"BWCS-MIO558SL-1","price":32.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43415946756186,"sku":"BWCS-MIO558SL-2","price":37.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43415946788954,"sku":"BWCS-MIO558SL-3","price":41.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MIO558SL-big.webp?v=1779758396","url":"https:\/\/batteryweb.com\/products\/t-com-sinus-wda-replacement-battery-37v-1300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}