{"product_id":"v-tech-ia5871-replacement-battery-36v-700mah-ni-mh","title":"VTech IA5871 Replacement Battery 3.6V 700mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eV Tech IA5871 \/ IP8100-2 Series — 3.6V Ni-MH Replacement Battery (89-1324-00-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 700mAh Ni-MH battery for V Tech cordless phone handsets, including the IA5871, 81002, 81003, and IP8100-2 series. It replaces OEM part numbers 89-1324-00-00, 80-5808-00-00, 80-5596-00, and 80-5654-00. When the original pack no longer holds a charge, this swap restores the handset to full wireless operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIA5871 and IP8100-2 series fit:\u003c\/strong\u003e\n    These models share the same 3.6V three-cell NiMH configuration, connector pinout, and physical footprint — 47 × 32 × 11.5mm. The base station charges via the same contact rail across all variants in this family, so one pack covers the full lineup.\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 V Tech handset base. The BMS accepted the NiMH voltage profile without triggering a fault light, and the handset powered on cleanly after the first full charge 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 there for a full 16 hours before using it. NiMH cells in cordless phones need that slow initial charge to reach rated capacity — skipping it leaves the first few cycles noticeably short.\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\"\u003eNiMH cells ship in a partial state of charge and need three to five full cycles before they hit rated capacity. On the first cycle, talk time will be visibly shorter than the old battery at its best — that is expected, not a fault. Each full charge-and-use cycle conditions the cells further. By cycle four or five, the pack should be delivering its full 700mAh.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station charge light not coming on after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA NiMH pack sitting in warehouse storage can drop to a voltage level the base station's charge controller treats as a fault condition — typically below around 3.0V. The base is looking for a minimum cell voltage before it starts the charge cycle. If the charge indicator stays off, remove the handset, wait 10 seconds, then reseat it firmly so both charging contacts close cleanly. If the light still does not come on, a brief trickle from a standalone NiMH charger at 50–100mA for 15 minutes can bring the pack above the acceptance threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340104073306,"sku":"BWCS-CPB9034-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340104106074,"sku":"BWCS-CPB9034-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340104138842,"sku":"BWCS-CPB9034-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPB9034-1.webp?v=1778367187","url":"https:\/\/batteryweb.com\/products\/v-tech-ia5871-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}