{"product_id":"noyes-w2003m-replacement-battery-144v-2600mah-li-ion","title":"Noyes W2003M 14.4V Li-Ion Replacement Battery 3900-05-001","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNoyes W2003M — 14.4V Li-ion Replacement Battery (3900-05-001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 2600mAh Li-ion battery for the Noyes W2003M handheld fiber optic inspection probe. It replaces OEM part number 3900-05-001. The W2003M is a field inspection instrument used in telecommunications and network testing environments.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eW2003M platform compatibility:\u003c\/strong\u003e\n    The W2003M draws power through a tightly controlled voltage rail that requires a pack matching the 14.4V nominal threshold and the correct BMS handshake. A mismatched BMS profile triggers an unrecognised-battery flag before the probe module even initialises.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through probe power-up sequences and sustained inspection loads. The BMS handled the initialisation current spike without tripping, and the pack held voltage within the instrument's accepted window throughout the logging session.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration step:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the W2003M instrument menu before field deployment. The instrument maps battery state during calibration — skipping it causes premature low-battery warnings on your first measurement session in the field.\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 W2003M pack sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the W2003M pack drops below approximately 2.5V per cell, the BMS trips into a protective lockout state and the instrument shows no sign of life. Standard chargers do not deliver enough trickle current to wake a locked-out BMS from that state. You need a charger with a recovery or wake mode that applies a low-current pre-charge pulse — typically around 0.1C — to bring the pack above the BMS recovery threshold before normal charging can resume.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage dropout causing readings to reset mid-logging session\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDuring a sustained inspection session, the probe module and data-logging functions draw combined current that can push a worn or partially charged pack into a brief undervoltage dip. The W2003M interprets this dip as a low-battery event and resets the active session to protect measurement integrity. The fix is not a reboot — it is ensuring the pack starts the session at or above 15.8V (fully charged). Verify pack voltage with a multimeter at the contacts before site deployment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360704954458,"sku":"BWCS-NYW200SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360704987226,"sku":"BWCS-NYW200SL-2","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360705019994,"sku":"BWCS-NYW200SL-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NYW200SL-1.webp?v=1778616161","url":"https:\/\/batteryweb.com\/products\/noyes-w2003m-replacement-battery-144v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}