JVC GR-D796 Replacement Battery BN-VF823 7.4V 2400mAh
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JVC GR-D796 Replacement Battery BN-VF823 7.4V 2400mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
JVC GR-D796 Replacement Battery BN-VF823 7.4V 2400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
2400mAh
JVC GR-D796 / GZ-HD40 Series — 7.4V Li-ion Replacement Battery (BN-VF823)
This is a 7.4V, 2400mAh Li-ion battery for JVC MiniDV and HD camcorders using the BN-VF823 or BN-VF923 battery platform. It fits a wide range of JVC models including the GR-D796, GR-D750, GZ-HD40, and GZ-HD40AC. Voltage and capacity match OEM spec: 7.4V nominal, 2400mAh (17.76Wh).
- GR-D and GZ-HD platform compatibility: JVC's GR-D and GZ-HD lines share the same battery bay geometry and voltage rail. The BN-VF823 and BN-VF923 are electrically identical at 7.4V — the numeric difference reflects JVC's OEM packaging, not a capacity or pin change. This cell fits both series without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a GZ-HD40 body. The BMS accepted the cell without fault codes, held charge-state communication with the camera, and did not trigger low-voltage cutoff prematurely under standard recording load.
- First-charge protocol for JVC camcorders: Charge this battery using the JVC OEM charger or directly in the camcorder body before first use. JVC's battery-remaining display calibrates against the cell's discharge curve during the first charge cycle inside the device — skipping this step can cause the indicator to read inaccurately from the start.
Why JVC camcorders show incorrect remaining time with a new cell
JVC's fuel gauge maps voltage thresholds to a discharge curve stored during the battery's initial charge cycle in the camera body. A new cell that hasn't completed this calibration cycle reports voltage correctly but gets mapped to the wrong percentage bracket. The camera reads the cell as fuller or emptier than it actually is. Run one full charge-discharge cycle through the camera body and the display stabilises.
Camera showing "no battery" or refusing to power on with replacement cell installed
This happens when the BMS on the new cell hasn't yet completed a handshake with the camera's battery authentication circuit. Remove the battery, wait 10 seconds, and reinsert it firmly — the contact pins on JVC battery bays are shallow and misalignment breaks communication. If the camera still won't power on, seat the battery in the OEM charger first until the charge LED confirms cell recognition, then transfer it to the camera body. Target a full charge to 8.4V before the first power-on attempt.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: JVC
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My JVC GR-D796 battery percentage jumps around — goes from 60% to 20% in a few minutes. Is the new battery faulty?
The cell is not faulty — the camera's fuel gauge is reading voltage thresholds against its old discharge curve, which doesn't match the new cell's profile. JVC camcorders recalibrate the indicator during the first full charge-discharge cycle completed inside the camera body. Run the battery down to automatic shutdown under normal recording load, then charge it fully via the camera body or OEM charger. The percentage display stabilises after that first full cycle.
The GZ-HD40 body feels warm during long recording sessions and the battery drains faster than expected — is something wrong?
Nothing is wrong with the battery. The GZ-HD40's HD sensor, image processor, and optical image stabilisation all draw current simultaneously during video recording — this is normal for the platform and generates heat at the body level. That combined draw is heavier than the camera's spec-sheet "typical use" figure, which assumes intermittent recording. Keep recording sessions under 30 minutes at a stretch in warm environments to avoid the camera's thermal protection circuit throttling power delivery. The cell is not the source of the heat.
After swapping in the new BN-VF823 battery, my GR-D750 powers on fine but cuts out suddenly — no warning, just off.
Sudden cutoff without a low-battery warning points to a BMS voltage-sag trip, not a dead cell. Under peak load — motor-driven tape transport startup, autofocus drive, and LCD all firing at once — the cell voltage briefly sags. If the BMS reads that sag as an undervoltage event, it cuts output to protect the cell. Charge the battery to full (8.4V) before use and avoid powering on the camcorder with the LCD extended, zoom active, and tape transport engaged simultaneously. If cutoffs continue, reseat the battery and confirm the contacts are clean and making full connection.
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