{"product_id":"mija-automatic-fragrance-replacement-battery-37v-2600mah-li-ion","title":"MIJA Automatic Fragrance 3.7V 2600mAh Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMIJA Automatic Fragrance MJXFJ01XW — 3.7V Li-ion Replacement Battery (INR18650-22S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2600mAh Li-ion 18650-format replacement battery for the MIJA Automatic Fragrance dispenser (MJXFJ01XW). It powers the timed spray motor and electronic control board. Capacity figure is sourced from the product specification — 9.62Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMJXFJ01XW compatibility:\u003c\/strong\u003e\n    The MJXFJ01XW uses a single 18650 cell on a 3.7V rail. The BMS on this cell handles the low-current motor pulse load and the standby draw of the timer circuit without tripping into protection mode.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through repeated timed spray sequences and monitored BMS response under motor-start current spikes. The protection circuit held stable across charge and discharge cycles without false cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePort dry-out before charging:\u003c\/strong\u003e\n    If the dispenser has been mounted near a sink or diffuser mist, dry the USB charging port for at least 30 minutes before connecting power. Moisture bridging the contacts can trigger a BMS protection fault that reads as a completely dead battery rather than a charging error.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MJXFJ01XW spray motor weakens before the battery indicator drops\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe spray motor draws a short, sharp current spike each time the dispenser fires. As a Li-ion cell ages and internal resistance climbs, that spike causes a momentary voltage sag. The BMS sees a brief undervoltage event and may throttle output before the resting voltage has dropped enough to trigger the low-battery indicator. The result is a weak or incomplete spray while the indicator still shows charge. Replacing the cell resets internal resistance and restores full motor drive voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery gauge drift from daily top-up charging\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePlugging the MJXFJ01XW in for short top-offs without ever fully discharging causes the fuel gauge to lose track of true capacity over time. The BMS calibration drifts, so the device reports full charge at a lower actual voltage than intended. This shows up as the dispenser cutting out sooner than expected between charges. Run the battery down to the low-battery warning, then charge to full in one uninterrupted session to re-anchor the gauge — 4.2V at the cell terminals confirms a complete charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415958126682,"sku":"BWCS-MJF001SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415958159450,"sku":"BWCS-MJF001SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415958192218,"sku":"BWCS-MJF001SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MJF001SL-1.webp?v=1779758425","url":"https:\/\/batteryweb.com\/products\/mija-automatic-fragrance-replacement-battery-37v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}