{"product_id":"kathrein-kt900-replacement-battery-48v-1800mah-ni-mh","title":"Kathrein KT900 Replacement Battery 4.8V 1800mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKathrein KT900 \/ KT910 — 4.8V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V, 1800mAh Ni-MH battery for the Kathrein KT900 and KT910 cordless DECT handsets. It replaces the original rechargeable pack that powers talk time and standby operation. Fit the new cell and the handset returns to normal wireless range from the base station.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKT900 and KT910 compatibility:\u003c\/strong\u003e\n    Both handsets run on the same 4.8V three-cell Ni-MH configuration and share the same connector footprint and physical envelope — 56.75 × 48.82 × 14.62mm. One battery pack covers 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 pack through charge and discharge on DECT handset test rigs, confirmed the BMS accepted a full charge without fault, and verified terminal voltage held steady through simulated RF transmit loads.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge conditioning for Ni-MH cordless packs:\u003c\/strong\u003e\n    After fitting, seat the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells shipped in partial-charge state need this slow initial cycle to reach rated 1800mAh capacity — skipping it leaves the pack performing below spec from day one.\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 original battery after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Ni-MH cells are not at full capacity straight out of the box — they need three to five full charge and discharge cycles to condition the cell chemistry. On the first cycle, usable capacity can sit 20–30% below the rated 1800mAh. Each subsequent full cycle closes that gap. Run the handset down to the low-battery warning, return it to the base for a full charge, and repeat. By cycle five, the pack should hit its rated output.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising charge on a freshly fitted pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs drop in terminal voltage during storage — if voltage falls far enough, the KT900 base station's charge circuit reads the pack as faulty and refuses to initiate a charge cycle. This is a threshold detection issue, not a defective battery. Place the handset firmly in the base and leave it undisturbed for at least two hours; the trickle stage will nudge the cell voltage above the acceptance threshold and the charge light should normalise. If the error persists past two hours, check the base contacts are clean and the handset is fully seated.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339951079514,"sku":"BWCS-CPS486CL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339951112282,"sku":"BWCS-CPS486CL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339951145050,"sku":"BWCS-CPS486CL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPS486CL-1.webp?v=1778367002","url":"https:\/\/batteryweb.com\/products\/kathrein-kt900-replacement-battery-48v-1800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}