{"product_id":"motorola-cp250-replacement-battery-72v-1800mah-ni-mh","title":"Motorola HNN8133C CP250 Replacement Battery 7.2V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola CP250 \/ GP300 Series — 7.2V Ni-MH Replacement Battery (HNN8133C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V, 1800mAh nickel-metal hydride replacement battery for the Motorola CP250, CP450, CP450LS, and GP300 series portable two-way radios. It cross-references OEM part numbers HNN8133C, HNN9628A, PMNN4005, and several others in the same family. Voltage and cell count match the original pack exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCP250 \/ CP450 \/ GP300 platform fit:\u003c\/strong\u003e\n    These radios share the same battery bay dimensions, six-cell NiMH voltage rail, and contact pin layout. The BMS handshake on the Motorola analog platform is contact-based — no digital authentication token is required, so swapping packs does not trigger a firmware rejection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and a sustained PTT-draw test on a CP250 unit. The BMS held voltage above the radio's low-battery cutoff threshold across the full discharge curve without false low-battery alerts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    If the dock LED flashes fault on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. Motorola single-unit drop-in chargers require a clean contact cycle before they will initiate the trickle pre-charge on a new NiMH pack at storage voltage.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the CP250 cuts out mid-transmission on a freshly inserted pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe CP250 draws a sharp current spike the moment PTT is pressed — transmit current can exceed 1.5A for the RF stage alone. A new NiMH pack sitting at storage voltage (typically 7.0–7.1V) has higher internal impedance than a fully charged cell. That impedance causes a momentary voltage sag that trips the radio's low-voltage protection before the pack has warmed up through even one charge cycle. Charge the pack fully in the dock before first use in the field. After two full charge-discharge cycles, cell impedance drops and the sag under TX load normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected on a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CP250 and GP300 use a simple voltage-threshold bar display — each bar corresponds to a voltage band, not a calibrated capacity reading. A new NiMH pack ships at roughly 60–70% state of charge to comply with transport regulations, so the resting voltage sits in the two-bar band rather than three. This is not a fault. Put the pack through a full charge cycle in the Motorola drop-in or multi-unit charger. After charge completes and the dock LED goes solid green, resting voltage will read in the full three-bar range at approximately 7.5–7.6V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426362884186,"sku":"BWCS-MTK628TW-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426362916954,"sku":"BWCS-MTK628TW-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426362949722,"sku":"BWCS-MTK628TW-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTK628TW_1.webp?v=1779930880","url":"https:\/\/batteryweb.com\/products\/motorola-cp250-replacement-battery-72v-1800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}