{"product_id":"panasonic-hhr-p505-replacement-battery-36v-1300mah-ni-mh","title":"Panasonic HHR-P505 Replacement Battery 3.6V 1300mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic HHR-P505 Series — 3.6V Ni-MH Replacement Battery (P-P501)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 1300mAh Ni-MH replacement battery for Panasonic cordless phone handsets. It fits the HHR-P505, KX-FPC135, KX-FPC141, KC-TC917HSB, and over 190 additional Panasonic DECT handset models. Drop this in when the original pack no longer holds a charge through a normal day of calls.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHHR-P505 and P-P501 series handsets:\u003c\/strong\u003e\n    These handsets share a 3.6V three-cell NiMH pack format with a standardised connector and cell arrangement. The base station charges via a constant-current trickle matched to this chemistry — swapping like-for-like keeps that charge circuit working correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through the HHR-P505 handset charge cycle and confirmed the base station accepted the battery without error, the BMS reached full charge cutoff, and voltage held stable at 3.6V under simulated call load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for NiMH handset packs:\u003c\/strong\u003e\n    After installing, seat the handset in the base for a full 16 hours before first use. NiMH cells in cordless phones need a slow initial charge to reach rated capacity — skipping this leaves you with a noticeably shorter first few cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRange drops after battery swap on HHR-P505 handsets\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HHR-P505 DECT radio module draws a spike of current during transmission. If the NiMH pack is not fully conditioned, its internal resistance is higher than normal, causing voltage to sag under that RF load. The handset compensates by reducing transmit power, which cuts your usable range. After three to five full charge-discharge cycles, internal resistance drops and range returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows no charge or error light with new battery installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNiMH batteries discharged during storage can sit below the voltage threshold the base station needs to begin a charge cycle. The base reads the pack as absent or faulty and shows no charge indicator. To recover, place the handset in the base for at least 30 minutes without disturbing it — most Panasonic bases will detect a rising voltage and enter normal charge mode once the pack climbs above approximately 3.0V. If the error persists past an hour, remove and reinsert the handset to reset the charge handshake.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340072550490,"sku":"BWCS-P501HL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340072583258,"sku":"BWCS-P501HL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340072616026,"sku":"BWCS-P501HL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-P501HL-1.webp?v=1778367047","url":"https:\/\/batteryweb.com\/products\/panasonic-hhr-p505-replacement-battery-36v-1300mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}