{"product_id":"spirit-su42-replacement-battery-75v-1100mah-ni-mh","title":"SPIRIT SU42 Compatible Battery 7.5V 1100mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSPIRIT SU42 \/ SV52 — 7.5V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.5V, 1100mAh Ni-MH replacement battery for the SPIRIT SU42 and SV52 two-way radios. It slots into the same battery bay as the original pack and connects to the radio's charging and BMS contacts without modification. No OEM part number is published for this battery; this pack is sourced to match the original voltage, capacity, and physical form factor.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSU42 and SV52 compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, contact layout, and 7.5V voltage rail. A single pack covers both radios, so there is no separate SKU needed between them.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit loads that mirror PTT bursts. The BMS held under the current spike that occurs at the start of each transmission without triggering an overcurrent lockout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    Ni-MH packs ship at storage charge, which sits below the dock's acceptance threshold on some SPIRIT chargers. If the dock LED flashes or does not respond, remove the battery, wipe the contact strip with a dry cloth, and reseat firmly to initiate the charge handshake.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SU42 cuts out mid-transmission on a fresh battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you press PTT, transmit current spikes sharply for the first fraction of a second before settling. On a Ni-MH pack that has been sitting in storage, internal impedance is temporarily elevated until the cells warm slightly under load. If the voltage dips below the radio's cutoff threshold during that spike, the SU42 drops the transmission. Running two or three short PTT cycles back-to-back warms the cells and lowers impedance enough for stable TX. This is not a fault in the pack — it resolves within the first few minutes of normal use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting this pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SU42 reads battery level from voltage thresholds, not a fuel gauge chip. A new Ni-MH pack at storage charge sits below the voltage point that the radio maps to a full-bar reading. The indicator will show one or two bars short of full until the pack completes its first full charge cycle. Place the battery in the charger and allow it to reach 8.4–8.5V before judging the bar display. After that first full charge, the indicator will read correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426341257306,"sku":"BWCS-MGP630TW-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426341290074,"sku":"BWCS-MGP630TW-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426341322842,"sku":"BWCS-MGP630TW-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MGP630TW-1.webp?v=1779930783","url":"https:\/\/batteryweb.com\/products\/spirit-su42-replacement-battery-75v-1100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}