{"product_id":"olympus-u730-replacement-battery-37v-660mah-li-ion","title":"Olympus LI-40B Replacement Battery 3.7V 660mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOlympus u730 \/ FE Series — 3.7V Li-ion Replacement Battery (LI-40B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 660mAh Li-ion cell that replaces the Olympus LI-40B and LI-42B batteries. It fits the u730, FE-290, FE-350 Wide, FE-160, and over 200 additional Olympus compact camera bodies. Same physical footprint and connector as the original — slides into the battery compartment and locks normally.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eu730 and FE Series compatibility:\u003c\/strong\u003e\n    These Olympus compacts share the same battery bay dimensions, contact layout, and 3.7V power rail. The LI-40B and LI-42B are interchangeable across the range because Olympus standardised this cell format across multiple generations of their FE and µ (mju) lines.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the u730 and FE-290 on the bench. The BMS accepted the cell on first install, the battery indicator populated correctly after one full charge cycle, and the protection circuit tripped normally at low-voltage cutoff without throwing an error state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge procedure on Olympus compact bodies:\u003c\/strong\u003e\n    Charge this cell inside the camera body or with the OEM Olympus charger before your first shoot. Some Olympus BMS firmware maps the battery-remaining indicator against a calibration charge cycle — skipping this step can cause the display to read full then drop suddenly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the u730 battery percentage drops suddenly from 50% to empty\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe u730 uses a voltage-threshold system to estimate remaining charge — it does not count coulombs. When a new cell has a slightly different discharge curve than the original Olympus cell, the camera misreads the voltage at mid-charge and maps it to the wrong percentage tier. The indicator then jumps when the voltage crosses the next threshold. Run one full charge-discharge cycle in the camera body and the indicator settles against the actual discharge curve of the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFlash not recycling fully between shots late in the charge cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe built-in flash on these compacts draws a concentrated burst of current to recharge the capacitor between shots. As the cell voltage drops toward the lower end of its discharge curve — typically below 3.5V — that recharge current sags, and the capacitor does not reach full charge before the next shot fires. The result is visibly weaker flash output and longer recycle time. If this appears during a shoot, switch the camera off for 30 seconds to let the cell voltage recover, then continue shooting at reduced burst pace.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333856165978,"sku":"BWCS-LI40B-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333856198746,"sku":"BWCS-LI40B-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333856231514,"sku":"BWCS-LI40B-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LI40B-1.webp?v=1778213291","url":"https:\/\/batteryweb.com\/products\/olympus-u730-replacement-battery-37v-660mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}