{"product_id":"clarigo-smp-508-replacement-battery-74v-1200mah-li-ion","title":"Clarigo SMP-508 Two-Way Radio Replacement Battery 7.4V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClarigo SMP-508 \/ SMP-528 — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 1200mAh Li-ion replacement battery for the Clarigo SMP-508 and SMP-528 portable two-way radios. It slots into the same battery bay and connects via the same contact strip as the original pack. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSMP-508 and SMP-528 compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, contact layout, and 7.4V nominal voltage rail. The BMS handshake threshold is identical across the two, so one pack covers both platforms without modification.\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 discharge on the SMP-508 platform. The BMS accepted the charger handshake on first insertion and held voltage within spec across the full discharge curve under simulated PTT load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the dock:\u003c\/strong\u003e\n    If the dock shows a fault LED on the first seating, remove the pack and wipe the gold contact strip with a dry cloth. Reseat firmly. The SMP platform 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 SMP-508 cuts out mid-transmission on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell ships at storage voltage — typically 3.6–3.7V per cell, not the 4.2V peak of a full charge. When you press PTT, the radio draws a sharp current spike to power the RF output stage. If the pack is at storage voltage, that spike can pull cell voltage below the BMS overcurrent threshold, triggering a momentary cutoff. The radio drops audio, then recovers as soon as the load clears. Fully charge the pack before first use on the SMP platform to avoid this cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator shows one fewer bar than expected after a full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SMP series uses a simple voltage-threshold bar indicator — each bar maps to a voltage window, not a fuel gauge percentage. A new cell fresh off the charger may read one bar short if it hasn't completed a full absorption phase. Leave the pack on the dock until the charge LED goes solid green rather than pulling it at the first green flash. After one complete charge cycle, the resting voltage settles above the next threshold and the indicator corrects itself.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426315206746,"sku":"BWCS-MTP528TW-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426315239514,"sku":"BWCS-MTP528TW-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426315272282,"sku":"BWCS-MTP528TW-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTP528TW-1.webp?v=1779930680","url":"https:\/\/batteryweb.com\/products\/clarigo-smp-508-replacement-battery-74v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}