{"product_id":"panasonic-kx-tg2302-replacement-battery-36v-850mah-ni-mh","title":"Panasonic HHR-P104 Cordless Phone Replacement Battery 3.6V 850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic KX-TG2302 \/ KX-TG2312 Series — 3.6V Ni-MH Replacement Battery (HHR-P104)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 850mAh Ni-MH replacement battery for the Panasonic KX-TG2302 and KX-TG2312 series cordless phones. It replaces OEM part numbers HHR-P104, HHR-P104A, P104A\/1B, and TYPE 29. The cell dimensions — 54.16 x 31.92 x 11.17mm — match the original battery bay exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKX-TG2302 \/ KX-TG2312 \/ KX-TG2313 compatibility:\u003c\/strong\u003e\n    These handsets share the same 3.6V single-cell Ni-MH power rail, connector pinout, and battery bay geometry — which is why one part number covers the full range. No wiring or adapter changes needed.\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 the KX-TG2312 handset. The base station accepted the battery without error lights, and the BMS reached full-charge termination cleanly on the first slow-charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for Ni-MH cordless packs:\u003c\/strong\u003e\n    Place the handset in the base immediately after installing and leave it for a full 16 hours before the first call. Ni-MH cells shipped from storage are partially discharged — skipping the slow first charge leaves capacity on the table for the first several cycles.\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 rated after the first few charges\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells go through a conditioning period — typically three to five full charge and discharge cycles — before they deliver rated capacity. A new pack that seems weak in the first week is usually still conditioning, not defective. The chemistry requires repeated cycling to align the crystalline structure of the electrode material. Run the handset until the low-battery alert triggers, return it to the base for a full slow charge, and repeat for at least three cycles before judging capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing a charging error or fault light after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePanasonic KX-TG bases use a delta-voltage detection circuit to confirm charging. If the replacement pack sits in storage long enough, its resting voltage can drop below the threshold the base expects on initial contact — causing a fault light instead of a charge indicator. Remove the handset, hold the power button for five seconds to discharge any residual capacitor charge, then reseat it firmly in the base. The base should re-detect the pack and begin a normal charge cycle once the cell voltage climbs above roughly 1.1V per cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340109938778,"sku":"BWCS-P104CL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340109971546,"sku":"BWCS-P104CL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340110004314,"sku":"BWCS-P104CL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-P104CL-1.webp?v=1778367188","url":"https:\/\/batteryweb.com\/products\/panasonic-kx-tg2302-replacement-battery-36v-850mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}