{"product_id":"cps-cp228-arc-edge-replacement-battery-37v-1100mah-li-ion","title":"CPS CP28 Compatible Battery for CP228 ARC Edge 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCPS CP228 ARC Edge — 3.7V Li-ion Replacement Battery (CP28)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion replacement battery for the CPS CP228 ARC Edge portable two-way radio. Part number CP28 matches the original pack spec and connector layout. It fits the CP228 ARC Edge directly, with no modification required.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCP228 ARC Edge fit:\u003c\/strong\u003e\n    The CP228 ARC Edge runs a single-cell Li-ion pack at 3.7V nominal. This battery matches that voltage rail and uses the same contact arrangement, so the radio's BMS handshake initialises on first insertion without throwing a fault state.\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 transmit-load sequences on the bench. The BMS held the cutoff threshold correctly under PTT transmit current spikes and recovered charge termination cleanly at full voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact strip on first dock insertion:\u003c\/strong\u003e\n    If the charger dock shows a fault LED on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The CP228 ARC Edge charging dock requires a clean contact cycle to accept the new 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 CP228 ARC Edge cuts out mid-transmission on a new CP28 battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells ship at storage voltage — typically 3.6V to 3.65V, not full charge. When PTT is pressed, transmit current spikes hard and fast. If the cell is at storage voltage, that spike can push the BMS over its overcurrent threshold and trigger a momentary cutout before the radio recovers. This is not a faulty pack. Charge the battery fully before first use in the field and the BMS will handle transmit spikes correctly from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCP228 ARC Edge showing one fewer signal bar than expected on a fresh CP28\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CP228 ARC Edge reads battery level from voltage thresholds, not a fuel gauge chip. A new pack at storage voltage sits close to the threshold between two bar levels, so the indicator can display one bar lower than the actual charge state. This is a voltage-threshold display behaviour, not a capacity fault. Charge the pack fully — at 4.2V the bar indicator will reflect the correct level.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426293743706,"sku":"BWCS-TMR446TW-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426293776474,"sku":"BWCS-TMR446TW-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426293809242,"sku":"BWCS-TMR446TW-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TMR446TW-1.webp?v=1779930602","url":"https:\/\/batteryweb.com\/products\/cps-cp228-arc-edge-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}