{"product_id":"v-tech-5838-replacement-battery-36v-300mah-ni-mh","title":"V Tech 5838 Cordless Phone Replacement Battery 3.6V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eV Tech 5838 \/ 5865 \/ 5884 \/ 5890 Series — 3.6V Ni-MH Replacement Battery (80-5074-00-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 300mAh Ni-MH rechargeable battery for V Tech cordless phone handsets. It replaces OEM part numbers 80-5074-00-00, 2422, and TL2615 across the 5838, 5865, 5884, 5890, and over 72 additional V Tech models. When the original pack no longer holds a charge, this is the direct cell-for-cell replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e5838 \/ 5865 \/ 5884 \/ 5890 compatibility:\u003c\/strong\u003e\n    These models share the same 3.6V three-cell NiMH pack, connector pinout, and base station charging circuit. One battery fits all of them without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on the 5838 handset platform. The base station's charge detection handshake accepted the battery immediately, and the BMS responded correctly to both trickle and fast-charge phases.\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 undisturbed for a full 16 hours before first use. NiMH cells at storage charge cannot reach rated capacity on a short charge — the slow first cycle is what unlocks the full 300mAh.\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\"\u003eNew NiMH cells ship at partial charge and need three to five full charge-discharge cycles before they hit rated capacity. On cycle one, you may see noticeably shorter talk time — that is normal, not a fault. Each subsequent full cycle reconditions the cells and recovers more of the 300mAh rating. Run the handset until it signals low battery, return it to the base for a full charge, and repeat until talk time stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing no charge or error light on new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eV Tech base stations check the incoming battery voltage before committing to a charge cycle. A pack that has sat in storage can drop low enough that the base rejects it as a fault condition. Remove the battery, let it sit at room temperature for 30 minutes, then reinsert and reseat the handset firmly — the base needs a solid contact to read voltage correctly. If the error persists, check the handset contacts with a cotton swab; oxidation on the gold pads blocks the handshake. A clean contact at 3.6V nominal is what the base needs to begin charging.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340004393050,"sku":"BWCS-ALM590CL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340004425818,"sku":"BWCS-ALM590CL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340004458586,"sku":"BWCS-ALM590CL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ALM590CL-1.webp?v=1778367023","url":"https:\/\/batteryweb.com\/products\/v-tech-5838-replacement-battery-36v-300mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}