{"product_id":"grundig-cp500-replacement-battery-36v-1200mah-ni-mh","title":"Grundig CP500 Replacement Battery 3.6V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGrundig CP500 \/ CP800 Series — 3.6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1200mAh Ni-MH replacement battery for Grundig cordless phone handsets. It fits the CP500, CP510, CP700, and CP800 series. Swap it in when the original pack no longer holds a charge or the handset dies mid-call.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCP500 \/ CP510 \/ CP700 \/ CP800 compatibility:\u003c\/strong\u003e\n    These models share the same 3.6V three-cell Ni-MH format, connector orientation, and physical footprint. One battery pack covers all four handset variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on a CP500 handset. The base station accepted the pack without error lights, and the BMS held voltage within the expected Ni-MH window across all test cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on a Grundig DECT handset:\u003c\/strong\u003e\n    After installing, place the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells in cordless phones need a slow initial charge to reach rated capacity — skipping this shortens talk time in early cycles.\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 Ni-MH pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells don't ship at full capacity. They leave the warehouse partially discharged and require three to five full charge-discharge cycles before they reach rated capacity. On a CP500 this means the first few days of use will feel underwhelming — that's the chemistry, not a fault. Run the handset down to low-battery warning, return it to the base for a full charge, and repeat. By cycle five the pack should be delivering close to the rated 1200mAh.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows no-charge indicator after fitting replacement battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eGrundig DECT bases check incoming voltage before starting the charge cycle. A Ni-MH pack that has sat in storage can drop low enough that the base refuses to engage. Remove the handset, wait 30 seconds, and reseat it firmly — this resets the charge detection circuit. If the error persists, the pack voltage is too low for the base to accept; place the handset in the base for 20 minutes with the phone powered off, then try again. The base should begin charging once the pack climbs above approximately 3.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340079661146,"sku":"BWCS-SIG920CL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340079693914,"sku":"BWCS-SIG920CL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340079726682,"sku":"BWCS-SIG920CL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SIG920CL_1.webp?v=1778367047","url":"https:\/\/batteryweb.com\/products\/grundig-cp500-replacement-battery-36v-1200mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}