{"product_id":"braun-d808-replacement-battery-37v-850mah-li-ion","title":"Braun D808 Compatible Battery 3.7V 850mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBraun D808 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 850mAh Li-ion cell replaces the original battery in the Braun D808 digital camera. It powers the image sensor, processor, and all in-body functions the camera needs to shoot and write files. Capacity figures come from the product specification — 850mAh \/ 3.15Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eD808 platform fit:\u003c\/strong\u003e\n    The D808 uses a flat-profile Li-ion cell at 3.7V nominal. The contact layout and cell footprint — 40.20 × 35.30 × 6.10mm — match the battery bay directly. No adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a camera-class load. The BMS held within normal voltage rails throughout, and the protection circuit tripped correctly at low-voltage cutoff without false positives.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge cycle on the D808:\u003c\/strong\u003e\n    Run the first full charge inside the camera body or OEM charger before shooting. Some Braun camera BMS systems only begin accurate battery-remaining calibration after the cell completes one charge cycle through the body's own charge controller.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDead battery indicator showing on a partially charged replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eCamera battery indicators map voltage thresholds to percentage segments. A new third-party cell can have a slightly different discharge curve than the OEM cell the camera was calibrated against. When the camera reads voltage near the boundary between two display segments, it may flag a low-battery warning even when the cell has usable charge remaining. Completing one full charge-to-discharge cycle through the camera body gives the BMS enough data to adjust its threshold mapping. After that cycle, the indicator tracks the actual state of charge more closely.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically during a shoot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eErratic percentage readings happen when the camera's voltage-to-percentage lookup table doesn't align with the new cell's discharge curve. The D808 samples terminal voltage at intervals and converts that to a display value — if the new cell sits at a voltage the original table treats as ambiguous, the readout jumps between segments. This is a calibration issue, not a cell fault. Run one full discharge to low-battery cutoff, then a full charge, to let the system re-anchor its reference points. After that, readings should stabilise across the charge range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333854625882,"sku":"BWCS-NP40FU-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333854658650,"sku":"BWCS-NP40FU-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333854691418,"sku":"BWCS-NP40FU-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NP40FU-1.webp?v=1778213292","url":"https:\/\/batteryweb.com\/products\/braun-d808-replacement-battery-37v-850mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}