{"product_id":"telekom-sinus-51-replacement-battery-36v-1200mah-ni-mh","title":"Telekom SINUS 51 Replacement Battery B3161 3.6V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTelekom SINUS 51 — 3.6V Ni-MH Replacement Battery (B3161)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1200mAh Ni-MH battery that replaces the original B3161 pack in the Telekom SINUS 51 cordless handset. It restores normal handset operation when the original battery no longer holds a charge. Fits the SINUS 51 handset directly using the original battery compartment.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSINUS 51 handset fit:\u003c\/strong\u003e\n    The SINUS 51 uses a single-cell 3.6V Ni-MH pack with a specific footprint of 15 × 45 × 53mm. The B3161 connector orientation and cell arrangement match what the handset's charging contacts and BMS expect — no adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the SINUS 51 base station and confirmed the BMS accepted the charge handshake without fault. Cell voltage climbed steadily through trickle and top-up phases with no thermal anomalies.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on SINUS 51:\u003c\/strong\u003e\n    After installing, seat the handset in the base station and leave it for a full 16 hours before making the first call. Ni-MH packs in DECT phones ship partially discharged — a slow first charge through the base lets the cells reach full rated capacity at 1200mAh.\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 the new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells in DECT handsets take three to five full charge-discharge cycles before reaching rated capacity. After the first install, the pack may deliver noticeably less talk time than the label suggests. This is a cell chemistry behaviour, not a fault. Run three complete cycles — full charge in the base, then use the handset until the low battery indicator appears — and capacity will stabilise near the 1200mAh rating.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing no charge or error light after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Ni-MH packs often arrive from storage at a low resting voltage — sometimes below 3.0V. Some SINUS 51 base stations will not initiate a standard charge cycle if the pack voltage is too low to cross the acceptance threshold. If the charge indicator does not light within a few minutes of docking, remove the handset, wait 30 seconds, and re-seat it firmly. If the fault persists, the base may need a brief trickle-start — leave the handset docked for at least one hour undisturbed to allow the base to detect a rising cell voltage and engage the full charge cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340042010714,"sku":"BWCS-TSU51CL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340042043482,"sku":"BWCS-TSU51CL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340042076250,"sku":"BWCS-TSU51CL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TSU51CL-1.webp?v=1778367047","url":"https:\/\/batteryweb.com\/products\/telekom-sinus-51-replacement-battery-36v-1200mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}