{"product_id":"franklin-est-4016-replacement-battery-37v-450mah-li-polymer","title":"Franklin EST-4016 Electronic Dictionary Replacement Battery 3.7V 450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFranklin EST-4016 — 3.7V Li-Polymer Replacement Battery (0D01004506PA0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 450mAh lithium-polymer battery for the Franklin EST-4016 electronic dictionary. It replaces OEM part number 0D01004506PA0. The EST-4016 is a handheld reference device, and this battery powers both the display and the processing functions.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEST-4016 platform fit:\u003c\/strong\u003e\n    The EST-4016 uses a slim Li-Polymer cell to keep the housing thin. This replacement matches the original cell dimensions — 42.52 × 29.86 × 4.42mm — so the connector reaches the board contacts without stressing the ribbon or flex cable.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the EST-4016 board. The BMS accepted the cell without error, the display initialised cleanly, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact seating after swap:\u003c\/strong\u003e\n    Once the new cell is connected, press the battery cover down firmly until it clicks. A partially seated cover on the EST-4016 leaves the spring contact fractionally short, which causes the unit to power off immediately after the power button is released.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSaved words and bookmarks disappearing after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe EST-4016 stores user data — saved words, bookmarks, and custom entries — in RAM that is backed by the main battery. When the original cell drops below its minimum hold voltage or is removed entirely, that RAM loses power and the data clears. This is normal behaviour, not a device fault. Back up any saved entries using the PC sync cable before pulling the old cell. Restoring from backup after fitting the new battery is the only way to recover that data.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEST-4016 backlight not coming on after a new battery is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe backlight circuit on the EST-4016 draws more current than the display and requires the battery to be above approximately 3.5V to activate. If the replacement cell ships partially discharged, the backlight may stay off even though the screen shows text. Charge the device for at least 30 minutes before testing the backlight. Once the cell reaches 3.7V, the backlight should respond normally to its toggle button.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360135348314,"sku":"BWCS-FNK406SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360135381082,"sku":"BWCS-FNK406SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360135413850,"sku":"BWCS-FNK406SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNK406SL-1.webp?v=1778610900","url":"https:\/\/batteryweb.com\/products\/franklin-est-4016-replacement-battery-37v-450mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}