{"product_id":"telekom-comfort-pro-cm-500-replacement-battery-37v-800mah-li-ion","title":"Telekom Comfort Pro CM 500 Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTelekom Comfort Pro CM 500 \/ CM 510 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 800mAh Li-ion battery for the Telekom Comfort Pro CM 500 and CM 510 cordless DECT handsets. It replaces the original cell when the handset no longer holds a charge or drops calls due to low voltage. Dimensions are 55.00 × 34.00 × 4.00mm — measure your current cell before ordering if you are unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCM 500 and CM 510 compatibility:\u003c\/strong\u003e\n    Both models share the same handset chassis, battery bay dimensions, and 3.7V supply rail. One cell fits both 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 the CM 500 platform. The protection circuit tripped correctly at the low-voltage cutoff and accepted a full charge from the base station without error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Li-ion cells ship partially charged but not full. Seat the handset in the base immediately after installation and leave it for a complete charge cycle before use — this lets the BMS calibrate its state-of-charge tracking against the new cell's actual capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than expected after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA Li-ion cell straight from storage often reads a partial state of charge that the BMS accepts without running a full cycle. The handset's fuel gauge can misread remaining capacity for the first one or two cycles until the BMS has tracked a complete charge and discharge. Run the handset down to the low-battery warning, then charge it fully in the base — repeat this once more if talk time still feels short. After two full cycles, reported capacity should align with the 800mAh rating.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHandset loses DECT pairing after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the old battery cuts all power to the handset, which can erase the stored base station pairing on some DECT phones. The CM 500 and CM 510 store pairing data in volatile memory that resets on a hard power loss. To re-register, hold the handset's page or register button while the base is in pairing mode — consult the base station label for the exact sequence. Once registered, the handset reconnects to the base normally and retains the pairing through subsequent battery swaps as long as the cell is not removed again.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339962515546,"sku":"BWCS-AST610CL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339962548314,"sku":"BWCS-AST610CL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339962581082,"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\/telekom-comfort-pro-cm-500-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}