{"product_id":"exfo-max-600-replacement-battery-37v-10000mah-li-polymer","title":"EXFO MAX-600 Replacement Battery 3.7V 10000mAh GP-2147","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEXFO MAX-600 Series — 3.7V Li-Polymer Replacement Battery (GP-2147)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 10000mAh Li-Polymer pack replaces the original battery in the EXFO MAX-600, MAX-605, MAX-610, and MAX-625 optical power meters and light source instruments. It matches the OEM cell dimensions (79.60 × 65.80 × 15.10mm) and the BMS profile the instrument firmware expects. Capacity figure is from the product specification sheet — 37Wh total.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMAX-600 series platform fit:\u003c\/strong\u003e\n    The MAX-600, MAX-605, MAX-610, and MAX-625 share the same battery bay geometry, connector pinout, and BMS communication protocol. One pack covers all four variants because EXFO standardised the power architecture across this instrument family.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack under sustained optical source load and monitored the BMS handshake through charge and discharge. The protection circuit responded correctly to over-current at probe initialisation and held stable voltage through continuous measurement sessions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration on the MAX-600:\u003c\/strong\u003e\n    After installing the new pack, run a full calibration cycle through the instrument menu before field deployment. The MAX-600 maps battery state during calibration — skipping this step causes the low-battery warning to trigger early on the first measurement session, even with a full charge.\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 MAX-600 sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge slowly in storage. If the pack drops below roughly 2.5V per cell, the BMS enters a protection lockout and the instrument will not power on — it draws nothing and shows no charging indicator. Recovery requires applying charge at a low pre-charge rate to bring the cell voltage back above the BMS wake threshold. Use the original EXFO charger or a lab supply set to 3.7V at 500mA and hold it connected for at least 30 minutes before attempting normal charging.\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 long logging session, the optical source and detector run simultaneously, pulling sustained current that can expose any internal resistance in an aged or cold cell. A momentary voltage sag at that combined load trips the instrument's under-voltage protection, resetting the active log. This is not a firmware fault — it is the BMS responding to a real dropout. Check the battery voltage reading in the instrument diagnostics menu; anything below 3.5V under load confirms the pack needs replacement. A new pack at full charge holds above 3.6V through sustained dual-port draw.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360536658010,"sku":"BWCS-EFX600SL-1","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360536690778,"sku":"BWCS-EFX600SL-2","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360536723546,"sku":"BWCS-EFX600SL-3","price":62.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EFX600SL-1.webp?v=1778615946","url":"https:\/\/batteryweb.com\/products\/exfo-max-600-replacement-battery-37v-10000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}