{"product_id":"pce-instruments-colorimeter-pce-csm-10-replacement-battery-37v-3500mah-li-polymer","title":"PCE Instruments Colorimeter BQ021 Compatible Battery 3.7V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePCE Instruments Colorimeter PCE-CSM 10 Series — 3.7V Li-Polymer Replacement Battery (BQ021 \/ PCE-CSM-BAT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 3500mAh lithium-polymer pack replaces the original battery in the PCE Instruments PCE-CSM 10, PCE-CSM 3, PCE-CSM 6, and PCE-CSM 7 colorimeters. These portable color measurement instruments share a common battery bay and connector layout across the CSM series. Capacity is 3500mAh (12.95Wh), matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePCE-CSM series compatibility:\u003c\/strong\u003e\n    The CSM 3, 6, 7, and 10 run on the same 3.7V single-cell architecture with identical connector pinout and BMS handshake requirements. Swapping between models in this series does not require firmware changes or repairing — the instrument reads pack state over the same communication line.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and discharge on the PCE-CSM platform, monitoring BMS response during sensor initialisation. The protection circuit handled the current spike at probe power-up without triggering a false cutoff, and the pack held voltage through sustained spectral measurement logging.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration requirement:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the instrument menu before field deployment. The PCE-CSM maps battery state during calibration, and skipping this step causes the low-battery indicator to fire prematurely on the first measurement session — even when the pack is fully charged.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePCE-CSM shutting down mid-measurement with voltage still showing on screen\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the sensor array initialises a new measurement cycle and pulls a short current spike the aged cell can no longer sustain. The BMS reads the resulting voltage sag as an undervoltage fault and cuts the output before the display can update. A new cell with lower internal resistance handles the same spike without the sag. If the instrument shuts down at the moment you press measure, the cell is the cause — not the sensor module.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack will not charge after the colorimeter sat unused for several months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells that self-discharge below approximately 2.5V during storage will cause the BMS to enter a locked sleep state. Most chargers send a standard charge current on connection, see no response, and halt. To recover the pack, connect it to the instrument and apply the charger for at least 10–15 minutes at a low rate — some chargers include a trickle or recovery mode that slowly brings the cell back above the 2.8V threshold the BMS needs to re-initialise. If the cell has dropped below 2.0V and the instrument shows no response after 20 minutes on charge, the cell is not recoverable and replacement is the correct step.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360429998170,"sku":"BWCS-PCE300SL-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360430030938,"sku":"BWCS-PCE300SL-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360430063706,"sku":"BWCS-PCE300SL-3","price":70.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PCE300SL_1.webp?v=1778614656","url":"https:\/\/batteryweb.com\/products\/pce-instruments-colorimeter-pce-csm-10-replacement-battery-37v-3500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}