{"product_id":"aastra-600d-replacement-battery-37v-800mah-li-ion","title":"Aastra 600d Cordless Phone Compatible Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAastra 600d \/ 610d \/ 620d \/ 630d Series — 3.7V Li-ion Replacement Battery (DK512009)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 800mAh lithium-ion battery replaces the OEM pack in the Aastra 600d, 610d, 620d, and 630d cordless DECT handsets. It matches the original cell format at 55 x 34 x 4mm and connects via the same OEM-spec connector. Part numbers DK512009, 23-001059-00, A600ST1, and 23-001080-00 all cross-reference to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e600d–630d platform compatibility:\u003c\/strong\u003e\n    These four handsets share the same battery bay geometry, connector pinout, and 3.7V supply rail. One cell fits all four without modification.\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 a 610d handset. The BMS accepted charge from a standard base cradle without fault, and voltage held steady through a full depletion cycle with no mid-cycle cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on a DECT handset:\u003c\/strong\u003e\n    After fitting, seat the handset in the base cradle for a full uninterrupted charge before first use. Li-ion cells shipped from storage often arrive at a reduced state of charge — a complete first cycle brings the cell to rated capacity and lets the handset's fuel gauge calibrate correctly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 600d series loses range when the battery ages\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eDECT transmitters draw current in sharp pulses during each radio burst. An aged or depleted Li-ion cell cannot sustain voltage under these short high-current spikes, so the handset drops transmit power to compensate. The result is reduced range — not a fault with the antenna or base station. Fitting a fresh cell at full charge restores the voltage headroom the transmitter needs and brings range back to spec.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHandset not pairing after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts all power to the handset, which can wipe the DECT pairing registration stored in volatile memory on some 600d-series units. The handset powers on but fails to locate the base or shows a \"searching\" indicator that never resolves. To fix this, run the pairing sequence from the base station menu while the handset is powered on and within 1 metre of the base. Once re-registered, normal operation resumes immediately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339962417242,"sku":"BWCS-AST610CL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339962450010,"sku":"BWCS-AST610CL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339962482778,"sku":"BWCS-AST610CL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AST610CL-1.webp?v=1778366983","url":"https:\/\/batteryweb.com\/products\/aastra-600d-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}