{"product_id":"polycom-kirk-5020-replacement-battery-37v-950mah-li-ion","title":"Polycom KIRK 5020 Compatible Battery 3.7V 950mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePolycom KIRK 5020 \/ 5040 — 3.7V Li-ion Replacement Battery (84743424)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 950mAh Li-ion battery fits the Polycom KIRK 5020 and KIRK 5040 cordless DECT handsets. It replaces OEM part numbers 84743424, ICP73048, and 84743428. Physically, it measures 51.54 × 32.75 × 8.30mm — confirm against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKIRK 5020 and 5040 compatibility:\u003c\/strong\u003e\n    Both handsets share the same battery bay dimensions, voltage rail, and connector pinout. One replacement covers both models without any modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a KIRK 5020 handset. The BMS accepted the charge handshake from the base station without error on first insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for KIRK handsets:\u003c\/strong\u003e\n    After fitting, seat the handset fully in the base cradle and leave it undisturbed for a complete 16-hour charge before first use. KIRK handsets delivered from storage may present a low-voltage cell to the charger — the slow first charge allows the base to bring the cell up from resting voltage without triggering a charge-reject cycle.\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\"\u003eA fresh Li-ion cell often delivers below-rated capacity for the first two to three full charge cycles. The cell's internal resistance sits slightly elevated out of storage, and the BMS clips charge termination early until it learns the cell's actual capacity curve. Run three full charge-and-use cycles before judging talk time against the rated 950mAh. By cycle three, most cells settle within 5% of rated output.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing no charge or refusing to accept the handset after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the KIRK base station shows a charge error or flashing light after a battery swap, the cell voltage is likely below the base's acceptance threshold from extended shelf storage. A cell sitting below roughly 3.0V will be rejected by the base charger as a fault condition. Connect the handset and leave it in the cradle without removing it — some KIRK bases will begin a trickle pre-charge after 60 seconds and transition to normal charging once the cell clears the minimum voltage. If the base still shows an error after 10 minutes, check that the handset contacts are clean and making firm contact with the cradle pins.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339918835802,"sku":"BWCS-CIP502CL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339918868570,"sku":"BWCS-CIP502CL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339918901338,"sku":"BWCS-CIP502CL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CIP502CL-1.webp?v=1778366983","url":"https:\/\/batteryweb.com\/products\/polycom-kirk-5020-replacement-battery-37v-950mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}