{"product_id":"casio-cassiopeia-e-3000-replacement-battery-37v-1500mah-li-ion","title":"Casio A716\/MBT Cassiopeia E-3000 Compatible Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCasio Cassiopeia E-3000 Series — 3.7V Li-ion Replacement Battery (A716\/MBT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1500mAh Li-ion battery for the Casio Cassiopeia E-3000, E-3073BAT, and E3074LBAT pocket PCs. These early-2000s PDAs run Windows CE and store active data — contacts, calendar entries, open files — in volatile RAM that depends entirely on main battery voltage. When the original cell degrades past a threshold, the device can no longer hold state between charges.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCassiopeia E-3000 series fit:\u003c\/strong\u003e\n    The E-3000, E-3073BAT, and E3074LBAT share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all three accept the A716\/MBT cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, standby, and active sync cycles on the E-3000 platform. The BMS communicated correctly with the device, accepted a full charge without fault flags, and held voltage within spec across load transitions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSync before you swap:\u003c\/strong\u003e\n    The Cassiopeia E-3000 stores open application state and unsaved data in RAM. That RAM loses power the moment the battery is removed. Do a full ActiveSync to the host PC before pulling the old cell — otherwise open records will not survive the swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Cassiopeia E-3000 loses RAM data on battery removal\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E-3000 uses SRAM for its working memory. SRAM requires continuous voltage to retain data — it is not flash storage. When battery voltage drops to zero, everything in RAM is gone: open databases, unsaved notes, installed applications stored in RAM rather than ROM. Some units include a small backup capacitor that buys a few seconds, but it cannot sustain the device through a full battery swap. Always sync to a host computer via ActiveSync before removing the battery.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCassiopeia E-3000 stuck on boot screen after fitting a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell can arrive at a storage charge of around 3.0–3.2V — below the minimum the E-3000 boot sequence needs to complete initialisation. The device powers on, reaches the boot screen, then stalls or resets in a loop. Connect the device to the cradle charger and leave it for at least 30 minutes before attempting to power on. Once the cell reaches approximately 3.6V, the boot sequence completes normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415954227290,"sku":"BWCS-A716SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415954260058,"sku":"BWCS-A716SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415954292826,"sku":"BWCS-A716SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-A716SL-1.webp?v=1779758425","url":"https:\/\/batteryweb.com\/products\/casio-cassiopeia-e-3000-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}