{"product_id":"detewe-dt413-replacement-battery-37v-1100mah-li-ion","title":"DeTeWe DT413 Replacement Battery 3.7V 1100mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDeTeWe DT413 \/ DT423 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1100mAh (4.07Wh) lithium-ion battery for the DeTeWe DT413 and DT423 cordless DECT handsets. It replaces the original cell when the handset no longer holds a charge or stops powering on. Dimensions are 73.60 × 43.50 × 11.00mm — verify these against your existing pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDT413 and DT423 compatibility:\u003c\/strong\u003e\n    Both handsets share the same battery bay dimensions, connector pinout, and 3.7V supply rail. One cell fits both models 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 bench. The BMS held cutoff correctly at both ends — no overcharge trip, no premature low-voltage shutdown under simulated standby and active RF load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Place the handset in the base station immediately after fitting this battery and leave it for a full 16 hours before use. Li-ion cells shipped in storage state need a slow, complete first charge to calibrate the BMS fuel gauge and reach rated capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DT413 shows reduced range after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DT413's DECT radio module draws a short current spike every time it transmits a burst. If the replacement cell has a higher internal resistance than the original — common with cells that have sat in storage — the voltage sags under that RF load. The handset's transmit power drops when supply voltage falls below threshold, which shortens the usable range noticeably. After 3 to 5 full charge cycles, internal resistance drops and the voltage sag stabilises. Range typically recovers on its own without any configuration change.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHandset not pairing with the base after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts all power to the DT413's RAM, which can erase the stored DECT pairing data. When the handset restarts with a new cell, the base station may not recognise it and will refuse to register calls. To fix this, put both base and handset into manual pairing mode — on most DeTeWe systems this means holding the registration button on the base for 3 seconds until the LED flashes, then triggering the pairing sequence from the handset menu. The handset will re-register as a new device and resume normal operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339892392026,"sku":"BWCS-AYD810CL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339892424794,"sku":"BWCS-AYD810CL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339892457562,"sku":"BWCS-AYD810CL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AYD810CL-1.webp?v=1778366905","url":"https:\/\/batteryweb.com\/products\/detewe-dt413-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}