{"product_id":"siemens-240-replacement-battery-36v-1200mah-ni-mh","title":"Siemens 240 Cordless Phone Compatible Battery 3.6V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSiemens 240 \/ 242 Series — 3.6V Ni-MH Replacement Battery (B-7010)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1200mAh Ni-MH battery for Siemens cordless phone models 240, 242, CS240, and CS242. It replaces OEM part B-7010 and fits directly into the handset battery bay. Capacity is rated at 4.32Wh — identical to the original spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e240 and CS240 series fit:\u003c\/strong\u003e\n    All four models — 240, 242, CS240, CS242 — share the same 3.6V single-cell Ni-MH pack with matching connector orientation and footprint. The B-7010 part number covers the full range.\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 the 240 platform. The handset accepted charge from the base without error, and the BMS held voltage within the expected Ni-MH discharge curve across multiple cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge protocol for Ni-MH handsets:\u003c\/strong\u003e\n    After installing, seat 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 first charge to reach rated capacity — skipping this is the primary reason users report short talk time out of the box.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing a charging error after fitting a new Ni-MH pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSiemens base stations check for a minimum voltage threshold before initiating the charge cycle. A new Ni-MH battery that has sat in storage can drop below this threshold — typically under 3.0V — and the base reads it as a fault rather than a dischargeable cell. This is not a defective battery. Placing the handset in the base for 30 minutes, removing it, then reseating it often allows the base to re-detect and begin charging. If the error persists, check that the handset contacts are clean and making full contact with the base cradle pins.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRange drops noticeably when the battery is below half charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDECT handsets like the Siemens 240 regulate transmit power partly based on available voltage. As a Ni-MH cell discharges, its terminal voltage sags — and below roughly 3.3V under RF load, the handset reduces transmission power to stay within its operating envelope. This shows up as shortened range or increased call drop rate, not a flat dead battery. The fix is straightforward: return the handset to the base more frequently. After 3–5 full charge cycles, the cell reaches its rated 1200mAh capacity and the voltage sag during RF transmission becomes less pronounced.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340090703962,"sku":"BWCS-CPB500CL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340090736730,"sku":"BWCS-CPB500CL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340090769498,"sku":"BWCS-CPB500CL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPB500CL-1.webp?v=1778367024","url":"https:\/\/batteryweb.com\/products\/siemens-240-replacement-battery-36v-1200mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}