{"product_id":"spare-minidvr-3-replacement-battery-37v-1100mah-li-ion","title":"Spare MiniDVR 3 Replacement Battery 3.7V 1100mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSpare MiniDVR 3 \/ H720 — 3.7V Li-ion Replacement Battery (US804533A1T4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion cell for the Spare MiniDVR 3 and H720 compact digital video recorders. It replaces OEM part US804533A1T4 directly. The cell measures 53.10 × 38.40 × 8.00mm and fits the original battery bay without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMiniDVR 3 and H720 platform fit:\u003c\/strong\u003e\n    Both devices share the same battery bay dimensions, connector pinout, and 3.7V single-cell architecture. One cell covers both units.\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 MiniDVR 3 body. The BMS accepted the cell without error flags, and voltage held steady across standard recording loads.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install charge cycle on miniature DVR bodies:\u003c\/strong\u003e\n    Run a full charge through the device's own USB charging circuit before first use. Some compact DVR BMS implementations need an in-body charge cycle to calibrate the battery-remaining indicator accurately — charging externally first can leave the display reading off by 20–30%.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MiniDVR 3 shows a dead-battery indicator on a freshly installed replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eCompact DVR bodies like the MiniDVR 3 often use a simple voltage-threshold method to estimate charge level. A new cell shipped in storage mode can sit at 3.5–3.6V — below the threshold the firmware treats as \"usable.\" The body reads this as empty and may refuse to start recording. Connecting to USB power for a full charge cycle resets this: once the cell reaches 4.2V and the BMS logs the full charge event, the indicator updates correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically on the MiniDVR 3 display\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the device's discharge curve map doesn't match the new cell's actual voltage profile. The firmware expects specific voltage steps at specific states of charge — if the cell's curve differs slightly, the indicator skips or jumps. It typically stabilises after two or three full charge-discharge cycles as the BMS learns the new cell's curve. If jumping persists past three cycles, check resting voltage with a multimeter: a healthy cell at 50% charge should read between 3.75V and 3.85V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333782601818,"sku":"BWCS-SPR300SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333782634586,"sku":"BWCS-SPR300SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333782667354,"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\/spare-minidvr-3-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}