{"product_id":"clarigo-smp-418-replacement-battery-74v-1200mah-li-ion","title":"Clarigo SMP-418 Compatible Battery 7.4V 1200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClarigo SMP-418 \/ SMP-458 \/ SMP-468 — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V 1200mAh Li-ion battery for the Clarigo SMP-418, SMP-458, and SMP-468 portable two-way radios. It replaces the original pack when capacity has dropped or the unit no longer holds a shift-length charge. Capacity is rated at 1200mAh (8.88Wh) — taken from the product specification, not extrapolated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSMP-418 \/ SMP-458 \/ SMP-468 platform fit:\u003c\/strong\u003e\n    These three models share the same battery bay dimensions, contact layout, and 7.4V nominal voltage rail, so a single pack covers all three. The BMS handshake protocol is identical across the range, confirmed against the physical connector and cell configuration.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit-load draws typical of PTT bursts and monitored the BMS response at each threshold. The protection circuit tripped correctly at overcurrent and recovered cleanly — no latched lockout during normal radio operation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the dock:\u003c\/strong\u003e\n    If the charger dock shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The SMP-series dock requires a clean contact cycle to complete the BMS handshake before it begins charging.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSMP-418 cutting out mid-transmission on a new battery\u003c\/h3\u003e\n\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 full-charge peak. When you key up on PTT, transmit current spikes sharply. If the pack hasn't completed a full charge cycle first, that current draw can pull the cell voltage below the BMS cutoff threshold momentarily, killing the transmission. The radio isn't faulty and the battery isn't defective — it needs one complete charge to 8.4V (pack level) before heavy PTT use. Run a full charge, then key up.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected on a fresh pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe SMP-series radios read voltage-threshold steps to drive the bar indicator — there is no fuel gauge chip counting charge in and out. A pack sitting at storage voltage (around 7.4V) maps to the second or third bar threshold, not the top. This is normal cell chemistry, not a capacity problem. Charge the pack fully to 8.4V and the indicator will move to its top bar as expected.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426328969306,"sku":"BWCS-MTP418TW-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426329002074,"sku":"BWCS-MTP418TW-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426329034842,"sku":"BWCS-MTP418TW-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTP418TW-1.webp?v=1779930681","url":"https:\/\/batteryweb.com\/products\/clarigo-smp-418-replacement-battery-74v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}