{"product_id":"bird-signal-hawk-sh-36s-replacement-battery-111v-10400mah-li-ion","title":"Bird Signal Hawk SH-36s 11.1V Replacement Battery 10400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBird Signal Hawk SH-36s — 11.1V Li-ion Replacement Battery (3S4P\/LIC18650-22C PCM)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 10400mAh (115.44Wh) lithium-ion battery pack for the Bird Signal Hawk SH-36s RF signal strength meter. It fits the SH-36s handheld survey instrument used for cellular network site surveys, field strength measurements, and coverage mapping. The pack uses a 3S4P cell configuration with an integrated PCM for cell-level protection.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSH-36s platform fit:\u003c\/strong\u003e\n    The Signal Hawk SH-36s runs its RF front end, display, and GPS logging from a single 11.1V rail. This pack matches that rail exactly and carries the same PCM handshake the instrument expects at power-up. Swapping to a pack with a different protection circuit triggers a hardware fault on the SH-36s before the first measurement screen loads.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through power-on initialisation and sustained RF scanning loads. The PCM held the 11.1V rail stable through the probe and GPS module wake-up sequence — the current spike that typically trips lower-rated packs did not interrupt the measurement session.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePre-deployment calibration cycle:\u003c\/strong\u003e\n    After installing this pack, run a full calibration cycle through the SH-36s instrument menu before heading into the field. The instrument maps battery state during calibration. Skip this step and the SH-36s will throw premature low-battery warnings during your first measurement session, even with a full pack.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutoff when the SH-36s GPS and RF modules initialise simultaneously\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SH-36s powers its GPS receiver and RF front end at the same moment during cold boot. That combined inrush can pull 2–3A for 200–400ms — enough to trip the overcurrent threshold on a degraded or undersized pack. The result looks like a spontaneous shutdown, not a fault code, so it's easy to misread as a display issue. This pack's PCM is rated for the inrush spike, so the boot sequence completes without interruption.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSH-36s not recognising a new pack after it sat unused in a carry case\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage, and if the pack voltage drops below roughly 9V the PCM enters sleep mode and blocks all charge input as a safety measure. The SH-36s will power on briefly from residual charge but immediately shut down or refuse to charge. To recover, connect the pack to a charger that applies a trickle or recovery charge at low current — most smart chargers have this mode. Once cell voltage climbs back above 10.5V, the PCM exits sleep and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360671236186,"sku":"BWCS-BSH360SL-1","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360671268954,"sku":"BWCS-BSH360SL-2","price":136.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360671301722,"sku":"BWCS-BSH360SL-3","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BSH360SL-1.webp?v=1778616161","url":"https:\/\/batteryweb.com\/products\/bird-signal-hawk-sh-36s-replacement-battery-111v-10400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}