{"product_id":"sony-ff2400-replacement-battery-36v-700mah-ni-mh","title":"Sony FF2400 Cordless Phone Replacement Battery 3.6V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony FF2400 \/ FF940 Series — 3.6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 700mAh Ni-MH replacement battery for Sony cordless phone handsets including the FF2400, FF940, FF9915, and GH2400C, among others. It restores power to handsets where the original cell has degraded and can no longer hold a usable charge. Physical dimensions are 45.60 × 31.30 × 10.60mm — confirm these match your handset battery bay before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFF2400 and FF940 series compatibility:\u003c\/strong\u003e\n    These models share the same 3.6V single-cell NiMH format, connector orientation, and charging circuit expectations. One pack fits across all listed handsets because the base station charges at a fixed trickle rate matched to this cell chemistry and capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge acceptance and voltage recovery cycles on FF-series handsets. The cell accepted charge cleanly from a cold state and held above the 3.4V threshold the handset needs to maintain RF transmission.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for NiMH cordless packs:\u003c\/strong\u003e\n    After installing, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells in cordless phones charge via slow trickle — a short first charge skips the conditioning needed to reach rated 700mAh capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRange dropping after a battery swap in the FF2400\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eCordless phone RF output is tied directly to supply voltage. When a NiMH pack hasn't been through conditioning cycles, its internal resistance is higher and voltage sags under the transmit load. The handset reads this sag as a low-battery state and reduces transmit power to compensate. Running three to five full charge-discharge cycles brings internal resistance down and stabilises the voltage rail under RF draw.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows no-charge or error light with a new NiMH pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNiMH batteries sitting in storage self-discharge over time and can arrive below the voltage floor the base station checks before enabling its charging circuit. If the base shows no activity or an error light, the pack may be sitting below 3.0V. Remove the handset, wait 30 seconds, reseat it firmly, and confirm the charge contact pins on both the handset and base are clean and making solid contact. A pack at or above 3.0V should trigger the charging circuit within two minutes of seating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339963138138,"sku":"BWCS-CPJ464CL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339963170906,"sku":"BWCS-CPJ464CL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339963203674,"sku":"BWCS-CPJ464CL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPJ464CL-1.webp?v=1777949695","url":"https:\/\/batteryweb.com\/products\/sony-ff2400-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}