{"product_id":"hoyttech-hd1-replacement-battery-37v-1100mah-li-ion","title":"HoytTech HD1 Replacement Battery 3.7V 1100mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHoytTech HD1 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1100mAh Li-ion cell replaces the original battery in the HoytTech HD1 compact digital camera. It fits the HD1 body directly and supports both photo and video capture modes. Capacity is 1100mAh (4.07Wh), matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHD1 platform fit:\u003c\/strong\u003e\n    The HD1 uses a slim Li-ion cell with a single-cell 3.7V nominal rail. This replacement matches that voltage rail and physical footprint — 53.10 x 38.40 x 8.00mm — so the door closes and the contacts seat correctly without modification.\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 the bench, monitoring BMS handshake behaviour. The protection circuit responded correctly to end-of-charge and low-voltage cutoff events without false tripping.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use charge cycle in the HD1 body:\u003c\/strong\u003e\n    Run the first full charge through the camera body itself, not an aftermarket external charger. Some compact camera BMS systems only begin accurate battery-remaining calibration after completing one charge cycle from within the body — skipping this step can cause the indicator to read erratically from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHD1 battery indicator jumping between levels mid-shoot\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HD1 maps its battery percentage display to a voltage-threshold table built around the original cell's discharge curve. A new replacement cell may have a slightly different curve, especially in the mid-range between 3.9V and 3.6V. The indicator can jump — say, from 60% to 30% — not because power is draining fast, but because the camera hits a voltage threshold sooner than its table expects. After two or three full charge-discharge cycles, the readings typically stabilise as the cell's curve settles.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHD1 showing dead battery indicator on a partially charged replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the HD1 displays a dead or absent battery icon immediately after inserting a new cell, the camera's BMS has not yet accepted the replacement. This happens when the cell voltage sits below the camera's recognition threshold — typically under 3.0V — after storage. Place the battery in the HD1, connect the camera to its OEM charger, and allow it to charge from within the body. Once the charger pushes the cell above 3.2V, the camera should recognise it and the icon will clear.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333782765658,"sku":"BWCS-SPR300SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333782798426,"sku":"BWCS-SPR300SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333782831194,"sku":"BWCS-SPR300SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SPR300SL-1.webp?v=1778213084","url":"https:\/\/batteryweb.com\/products\/hoyttech-hd1-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}