{"product_id":"motorola-ct150-replacement-battery-72v-1800mah-ni-mh","title":"Motorola CT150 HMNN4151 Replacement Battery 7.2V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola CT150 \/ CT250 \/ CT450 Series — 7.2V Ni-MH Replacement Battery (HMNN4151)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V 1800mAh Ni-MH replacement battery for the Motorola CT150, CT250, CT450, and CT450LS two-way radios. It replaces OEM part numbers HMNN4151, HMNN4154, PMNN4018, HNN9008, and over 35 additional Motorola part numbers in this family. Capacity is rated at 1800mAh (12.96Wh) — matched to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCT150 \/ CT250 \/ CT450 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay geometry, contact alignment, and 7.2V Ni-MH voltage rail across the series. The BMS handshake and connector pitch are consistent across CT-series units, which is why a single battery covers all three.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on CT-series hardware. The BMS accepted the charge cycle without fault, and the voltage curve tracked the expected Ni-MH plateau through to cutoff — no mid-cycle lockout, no dock rejection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on a CT-series charger dock:\u003c\/strong\u003e\n    If the dock LED shows a fault on first insertion, remove the battery, wipe the contact strip with a dry cloth, and reseat firmly. The CT-series charger requires a clean contact cycle to initiate the BMS handshake before current delivery begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the CT450 cuts out mid-transmission on a fresh battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePressing PTT draws a sharp current spike — significantly higher than standby draw — as the radio switches to transmit mode. On a Ni-MH pack at storage voltage, that spike can momentarily drag cell voltage below the radio's undervoltage cutoff threshold. The radio interprets this as a depleted pack and shuts TX. One full charge cycle raises resting voltage high enough that the transmit spike no longer triggers the cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CT-series bar indicator reads voltage thresholds — it does not track charge state electronically. A new Ni-MH cell ships at storage voltage, typically around 6.8–7.0V, which sits below the top-bar threshold of approximately 7.2V. The radio displays one or two bars even though the pack is not depleted. After a full charge cycle brings resting voltage up to spec, the indicator will read correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426363048026,"sku":"BWCS-MTK140TW-1","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426363080794,"sku":"BWCS-MTK140TW-2","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426363113562,"sku":"BWCS-MTK140TW-3","price":62.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTK140TW-1.webp?v=1779930880","url":"https:\/\/batteryweb.com\/products\/motorola-ct150-replacement-battery-72v-1800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}