{"product_id":"sokkia-archer-2-data-collector-replacement-battery-37v-10400mah-li-ion","title":"Sokkia Archer 2 Data Collector Compatible Battery 3.7V 10400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSokkia Archer 2 \/ FC-500 — 3.7V Li-ion Replacement Battery (1003778-01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V Li-ion battery replaces OEM part 1003778-01 in the Sokkia Archer 2 Data Collector and FC-500. It runs at 10400mAh (38.48Wh) — the same capacity spec as the original pack. Both devices use an identical connector and BMS handshake, so one replacement covers either unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eArcher 2 and FC-500 compatibility:\u003c\/strong\u003e\n    Both units share the same 3.7V battery bay, connector pinout, and BMS communication protocol. Swapping between them requires no adaptation — the charge controller reads the same protection registers on either device.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the pack through the Archer 2's full power-on sequence, including GNSS module initialisation and active satellite lock. The BMS held stable through the initialisation current spike and did not trip the protection circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-deployment cycle on the Archer 2:\u003c\/strong\u003e\n    After installing, run a full calibration cycle through the Archer 2's instrument menu before heading into the field. The device maps battery state during that sequence — skipping it causes the low-battery indicator to fire early on the first real survey 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 during GNSS satellite acquisition on the Archer 2\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the Archer 2 powers on and begins acquiring satellites, the GNSS module draws a short current spike as it initialises the RF front end. On a degraded or deeply discharged cell, this spike can push instantaneous draw past the BMS overcurrent threshold, tripping the protection circuit before the device fully boots. The result looks like a power-on failure, but it's a protection event — not a dead battery. A fresh, fully charged pack clears the condition because cell impedance is low enough to absorb the spike without the voltage rail sagging below the BMS cutoff point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eArcher 2 battery percentage jumping at reboot after pack replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a new pack, the Archer 2's charge indicator may display an erratic or inconsistent percentage for the first few power cycles. The device's internal voltage-threshold indicator is recalibrating its reference points to the new cell's discharge curve. This is normal behaviour and not a fault with the replacement pack. Run two full charge-discharge cycles through the device and the percentage display will stabilise to accurate readings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360733003866,"sku":"BWCS-JUP200SL-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360733036634,"sku":"BWCS-JUP200SL-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360733069402,"sku":"BWCS-JUP200SL-3","price":65.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JUP200SL-1.webp?v=1778616210","url":"https:\/\/batteryweb.com\/products\/sokkia-archer-2-data-collector-replacement-battery-37v-10400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}