{"product_id":"twinbird-indoor-monitor-vc-j570im-replacement-battery-36v-700mah-ni-mh","title":"Twinbird VC-BA08NM Indoor Monitor Compatible Battery 3.6V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTwinbird Indoor Monitor VC-J570IM — 3.6V Ni-MH Replacement Battery (VC-BA08NM)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 700mAh Ni-MH battery for the Twinbird Indoor Monitor VC-J570IM. It replaces OEM part VC-BA08NM, restoring power to the monitor handset when the original cell no longer holds a charge. The physical dimensions are 43 x 31 x 8mm — confirm your existing pack matches before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVC-J570IM monitor unit:\u003c\/strong\u003e\n    This monitor runs on a single Ni-MH cell pack at 3.6V. The BMS in the base station expects that voltage band. A Li-ion substitute would overshoot the charge curve and trigger a fault — only Ni-MH chemistry works here.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the VC-J570IM base station and confirmed the charge circuit accepted the cell without error flags. Capacity reached 680–700mAh by cycle three, consistent with the rated spec.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for this monitor:\u003c\/strong\u003e\n    After installing, seat the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells shipped from storage sit at low state-of-charge — a slow initial charge is how they reach rated capacity. Skipping this step is the main reason buyers report short talk time on new packs.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station charge error on a freshly installed Ni-MH pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH batteries lose voltage during storage. A pack sitting in a warehouse for several months can drop below 3.0V. Some cordless phone base stations read that as a fault condition and refuse to begin charging. The fix is a short boost: place the handset in the base, wait 10 minutes, remove it, then reseat it. This two-step triggers most base charge circuits to retry at a trickle rate, pulling the cell voltage up to the acceptance threshold — typically 3.2V — before switching to normal charge mode.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVC-J570IM losing range within days of a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRF transmit power on DECT monitors draws a short current spike each time the unit communicates with the base. A Ni-MH cell that hasn't been properly conditioned shows voltage sag under that load, and the monitor's power circuit interprets the sag as low battery — cutting transmit power to protect the cell. The result is reduced range or dropped audio, not a faulty battery. Run three full charge-discharge cycles through normal use and the internal resistance drops, sag reduces, and range returns to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339972182106,"sku":"BWCS-ALD935CL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339972214874,"sku":"BWCS-ALD935CL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339972247642,"sku":"BWCS-ALD935CL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ALD935CL-1.webp?v=1778366983","url":"https:\/\/batteryweb.com\/products\/twinbird-indoor-monitor-vc-j570im-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}