{"product_id":"panasonic-3807-replacement-battery-36v-600mah-ni-mh","title":"Panasonic P-P301 Cordless Phone Replacement Battery 3.6V 600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic KX-T3610 \/ KX-T3640 Series — 3.6V Ni-MH Replacement Battery (P-P301)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V, 600mAh Ni-MH pack replaces the P-P301 battery in Panasonic cordless phone handsets. It fits the 3807, KX-T3610, KX-T3620, KX-T3640, and over 80 additional handset models that share the same voltage rail and connector footprint. Dimensions are 42.64 × 30.00 × 14.45mm — check these against your existing pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKX-T3610 \/ KX-T3640 platform fit:\u003c\/strong\u003e\n    These handsets share the same charging circuit, connector pinout, and 3.6V NiMH acceptance threshold. One battery revision covers the full range — the base station's charge controller sees no difference between models.\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 a KX-T3610 handset. The base station's charge indicator lit immediately, the BMS accepted the pack without error, and capacity stabilised at rated output by the fourth cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for NiMH handsets:\u003c\/strong\u003e\n    After installing, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cordless phone batteries don't reach rated capacity from a standard quick top-up — the slow first charge is what sets the cell chemistry correctly.\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\"\u003eNiMH cells ship in a partially discharged state and require three to five full charge-discharge cycles before reaching rated capacity. On cycle one, talk time will feel noticeably shorter than the original. This is normal cell conditioning, not a defect. Run the handset until the low-battery tone sounds, return it to the base for a full 16-hour charge, and repeat — capacity increases with each cycle until it stabilises at 600mAh.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows no charge light after swapping the battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePanasonic base stations use a voltage-sensing circuit to confirm a valid pack is seated before enabling the charge LED. A NiMH cell that has self-discharged below roughly 3.0V during storage can fall under that acceptance threshold. If the charge light stays off, remove the handset, wait 10 seconds, and reseat it firmly — contact pressure matters. If the light still doesn't appear, the pack may need a trickle pre-charge: some third-party chargers can bring it up to 3.3V, at which point the base station will recognise it and take over.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340105482330,"sku":"BWCS-CPB8013-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340105515098,"sku":"BWCS-CPB8013-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340105547866,"sku":"BWCS-CPB8013-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPB8013-1.webp?v=1778367187","url":"https:\/\/batteryweb.com\/products\/panasonic-3807-replacement-battery-36v-600mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}