{"product_id":"horizon-kronos-c3-replacement-battery-74v-2600mah-li-ion","title":"Horizon Kronos C3+ Survey Battery 7.4V 2600mAh HKB10","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHorizon Kronos C3+ — 7.4V Li-ion Replacement Battery (HKB10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 2600mAh Li-ion battery replaces the HKB10 pack in the Horizon Kronos C3+ survey and field measurement instrument. It fits the standard battery bay and connects directly to the instrument's power management circuit. Capacity figures match the product data — 19.24Wh at nominal voltage.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKronos C3+ platform fit:\u003c\/strong\u003e\n    The C3+ runs its sensor array and GPS module from a single 7.4V rail. This pack matches that rail, the original connector pinout, and the BMS handshake the instrument expects at power-on.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through probe initialisation and sustained logging loads. The BMS held stable through the current spike at sensor power-up and did not trip under continuous measurement draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration on the Kronos C3+:\u003c\/strong\u003e\n    After installing, run a full calibration cycle through the instrument menu before heading into the field. The C3+ maps battery state during calibration — skipping this step causes premature low-battery warnings on the first measurement session.\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 Kronos C3+ probe module initialises\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt startup, the C3+ powers its probe or sensor module as a single event, drawing a brief but sharp current spike. If the pack's BMS has a low instantaneous-current threshold — common in aged or deeply discharged cells — it interprets this spike as a fault and trips. The instrument may restart or display a battery error immediately after the probe initialises. This pack's BMS is rated to handle that initialisation surge without tripping under normal operating temperature.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKronos C3+ shuts down mid-session but battery indicator still shows charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when cell voltage drops below the instrument's cutoff threshold under sustained sensor load, even though the resting voltage — what the indicator reads at idle — still looks acceptable. The C3+ draws more current during active logging than at rest, exposing voltage sag that the indicator doesn't reflect. A degraded original pack will sag to the cutoff threshold under load while still reading 40–50% at idle. If shutdown occurs mid-session, charge the pack fully and check resting voltage with a multimeter — it should read at or above 8.0V off-charger.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360793296986,"sku":"BWCS-LI1XL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360793329754,"sku":"BWCS-LI1XL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360793362522,"sku":"BWCS-LI1XL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LI1XL-1.webp?v=1778616260","url":"https:\/\/batteryweb.com\/products\/horizon-kronos-c3-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}