{"product_id":"motorola-cp040-replacement-battery-75v-2600mah-li-ion","title":"Motorola CP040 Compatible Battery 7.5V 2600mAh PMNN4254","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola CP040 \/ CP140 Series — 7.5V Li-ion Replacement Battery (PMNN4254AR)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.5V, 2600mAh lithium-ion battery replaces the original pack on Motorola CP-series portable two-way radios. It fits the CP040, CP100, CP100D, and CP140, along with 28 additional CP-series models that share the same voltage rail and connector format. Cross-references include PMNN4254AR, NNTN4851, PMNN4081AR, and over 30 other Motorola OEM part numbers.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCP-series platform fit:\u003c\/strong\u003e\n    These models share a common 7.5V architecture, identical battery bay dimensions, and the same BMS handshake protocol — which is why one pack covers the full range without a firmware or connector conflict.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through PTT transmit loads on the CP040. The BMS handled the current spike on key-up without tripping, and the charger dock accepted the new pack without a fault LED after a clean contact seating.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    If the dock shows a fault LED on the first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly — the CP-series dock requires a clean contact cycle to complete the BMS handshake before charging 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 CP040 drops to reduced TX power mid-shift on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell ships at storage voltage — typically around 3.7V per cell, not full charge. Under sustained RF output, the radio draws peak current and the BMS reads the resulting voltage sag as a low-battery condition. The radio responds by stepping down transmit power to protect the pack. A full charge cycle before the first shift eliminates this — the cells need to reach operational voltage before the radio can sustain full TX output.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing fewer bars than expected after fitting a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CP040 uses a voltage-threshold bar indicator, not a fuel gauge chip. A new cell at storage voltage reads lower than a freshly charged pack, so the radio displays one or two bars even though the battery is not depleted. This is not a fault with the battery. Charge the pack fully in the dock — once cell voltage climbs above the top threshold, the indicator will display correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426328543322,"sku":"BWCS-MCP186TW-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426328576090,"sku":"BWCS-MCP186TW-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426328608858,"sku":"BWCS-MCP186TW-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MCP186TW-1.webp?v=1779930681","url":"https:\/\/batteryweb.com\/products\/motorola-cp040-replacement-battery-75v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}