{"product_id":"kinryo-kc3411a-replacement-battery-48v-2000mah-ni-mh","title":"Kinryo KC3411A 4.8V Replacement Battery 2000mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKinryo KC3411A \/ KC3412A Series — 4.8V Ni-MH 2000mAh Replacement Battery (KC0402A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V, 2000mAh Ni-MH replacement battery for the Kinryo KC3411A, KC3411B, KC3412A, KC3412B, and over 24 additional compatible models in this instrument series. It replaces OEM part numbers KC0402A and 5441-1445. The pack restores power to surveying and field measurement instruments that have degraded or failed batteries.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKC3411 and KC3412 series compatibility:\u003c\/strong\u003e\n    These models share the same 4.8V four-cell Ni-MH architecture, connector pinout, and BMS handshake protocol — the same pack runs across all variants 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 probe initialisation loads and sustained sensor draw. The BMS held stable across both events with no spurious cutoff or voltage dropout at the measurement circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the instrument menu before heading into the field. The instrument maps battery state during calibration — skipping it causes premature low-battery warnings during your first measurement session, even with a fully charged pack.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS lockout after the instrument sat unused in a carry case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge over storage. If the KC3411A or KC3412A sat unused long enough, the pack voltage can drop below the BMS recovery threshold — typically around 4.0V for a 4.8V four-cell pack. When this happens, the charger may show no activity and the instrument may not power on at all. Reactivation usually requires a controlled trickle charge at low current (around 50–100mA) until the pack climbs back above the BMS re-initialisation threshold before a normal charge cycle can resume.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReadings resetting or dropping out during a live logging session\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is not a firmware issue — it is a voltage dropout under sustained sensor load. During a logging session, the instrument draws continuous current across the measurement circuit, and a degraded or partially charged cell in the pack can sag below the instrument's minimum operating voltage. The processor resets to protect data integrity, which looks like a random restart. Charge the pack fully, then verify cell balance — if the dropout persists at the same point in a session, one cell in the pack has diverged and the pack needs replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360710557786,"sku":"BWCS-KRY341SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360710590554,"sku":"BWCS-KRY341SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360710623322,"sku":"BWCS-KRY341SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KRY341SL-1.webp?v=1778616209","url":"https:\/\/batteryweb.com\/products\/kinryo-kc3411a-replacement-battery-48v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}