{"product_id":"kirk-3040-replacement-battery-36v-700mah-ni-mh","title":"Kirk 3040 Cordless Phone Compatible Battery 3.6V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKirk 3040 \/ 4020 \/ 4040 \/ 4080 — 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 the Kirk 3040, 4020, 4040, and 4080 cordless DECT handsets. It slots into the handset battery compartment and restores the ability to hold a charge and complete calls. Dimensions are 45.00 × 31.10 × 10.50mm — verify against your original cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKirk 3040 \/ 4020 \/ 4040 \/ 4080 compatibility:\u003c\/strong\u003e\n    These four handsets share the same battery bay geometry and 3.6V Ni-MH charge circuit, so one cell fits all four. The base station charges at a fixed current profile matched to this chemistry and voltage — swapping to any other chemistry will cause charge faults.\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 the Kirk base station, confirming the charge circuit accepted the pack without triggering a fault light and that voltage held steady through a full standby period.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for Kirk 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 shipped in partial-discharge state need that slow first charge to reach rated capacity — cutting it short locks in a lower usable ceiling 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 the original battery after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells do not deliver full rated capacity on cycle one. The first three to five charge-discharge cycles gradually increase the amount of charge the cell can accept and hold. If talk time feels short immediately after swapping, run the handset down to the low-battery warning, return it to the base for a full charge, and repeat. By cycle five, capacity should be at or near the rated 700mAh.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station charge light not activating after new battery installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells can drop below 3.0V during storage, and some Kirk base stations will not begin a standard charge cycle if the pack voltage sits below their acceptance threshold. Remove the handset, wait 30 seconds, and reseat it firmly — contact pressure matters. If the fault persists, the base may need a recovery charge: hold the handset in the cradle with light downward pressure for two minutes, then release. Target resting voltage once charging begins is approximately 3.6–4.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339929550938,"sku":"BWCS-NTL743CL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339929583706,"sku":"BWCS-NTL743CL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339929616474,"sku":"BWCS-NTL743CL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NTL743CL_1.webp?v=1778367002","url":"https:\/\/batteryweb.com\/products\/kirk-3040-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}