{"product_id":"exfo-ox1-replacement-battery-37v-6500mah-li-polymer","title":"EXFO OX1 E018 Replacement Battery 3.7V 6500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEXFO OX1 Optical Explorer — 3.7V Li-Polymer Replacement Battery (E018)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 6500mAh (24.05Wh) Li-Polymer pack replaces the OEM battery in the EXFO OX1, OX1 Optical Fiber Multimeter, and OX1 Optical Explorer. It fits anywhere the E018 or GP-3150 part number is called out. The OX1 is a field-portable optical power meter and light source used for fiber optic installation and maintenance.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOX1 platform fit:\u003c\/strong\u003e\n    All OX1 variants share the same 3.7V cell format, connector pinout, and BMS handshake protocol. Swapping between OX1 Multimeter and OX1 Explorer units requires no adapter or firmware change — the same pack seats and communicates identically across the platform.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the OX1's power-up sequence, including optical source activation and power meter initialisation. The BMS held voltage within spec across both high-draw probe events and sustained steady-state logging draws without triggering a cutoff.\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 OX1 instrument menu before heading into the field. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings to appear during your 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 lockout after the OX1 sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge slowly during storage. If the OX1 sat in a case long enough, the pack voltage can drop below 3.0V — the threshold where most BMS circuits latch into deep-discharge lockout and refuse to accept a charge. The instrument won't power on, and the charger shows no activity. To recover, apply a slow, low-current charge directly to the pack for 10–15 minutes using a compatible Li-Po charger set below 0.1C, then reconnect and retry the standard charge cycle. If the cell recovers above 3.2V, normal charging resumes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOX1 display shows inconsistent battery percentage at every reboot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a new cell is installed, the OX1's state-of-charge indicator hasn't yet mapped the voltage curve of the replacement pack — it's still referencing thresholds calibrated to the old, degraded cell. This causes the percentage readout to jump or reset differently on each power cycle. The fix is straightforward: run two full charge-to-discharge cycles through normal field use, then charge fully to 4.2V before the third session. After that, the indicator stabilises and tracks accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360541573210,"sku":"BWCS-EFX018SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360541605978,"sku":"BWCS-EFX018SL-2","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360541638746,"sku":"BWCS-EFX018SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EFX018SL-1.webp?v=1778615945","url":"https:\/\/batteryweb.com\/products\/exfo-ox1-replacement-battery-37v-6500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}