BN-VF808 JVC GR-D796 Camcorder Replacement Battery 7.4V 800mAh
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BN-VF808 JVC GR-D796 Camcorder Replacement Battery 7.4V 800mAh - 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.
BN-VF808 JVC GR-D796 Camcorder Replacement Battery 7.4V 800mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
800mAh
JVC GR-D796 / GZ-HD40 Series — 7.4V Li-ion Replacement Battery (BN-VF808)
This is a 7.4V, 800mAh Li-ion battery pack built to replace the BN-VF808 and BN-VF808U in JVC MiniDV and HD camcorders. It fits the GR-D796, GR-D750, GZ-HD40, GZ-HD40AC, and hundreds of compatible JVC models sharing the same connector and voltage rail. Capacity is sourced from product specification — 800mAh, 5.92Wh.
- GR-D796 / GZ-HD40 platform fit: These models share the same BN-VF808 form factor, contact layout, and 7.4V nominal voltage rail. The BMS handshake on this platform authenticates based on voltage signature and connector pinout — not a proprietary chip — so third-party cells are accepted without firmware rejection on most body revisions.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on GR-D796 and GZ-HD40 bodies. The BMS balanced correctly across both cells in the pack, and the low-battery cutoff triggered at the expected threshold without premature shutdown or voltage sag during active recording.
- First-cycle calibration on JVC bodies: Run one full charge cycle through the OEM JVC charger or camera body before heavy shooting. Some JVC body revisions map battery-remaining percentage against a stored discharge curve — skipping this step causes the indicator to jump erratically or read full when the cell is already mid-depleted.
Battery percentage jumping on the GR-D796 LCD mid-recording
The GR-D796 maps its battery indicator to voltage thresholds calibrated against the discharge curve of a conditioned cell. A new replacement cell that hasn't completed a full charge cycle presents a slightly different voltage profile at each threshold point. The body misreads those thresholds and jumps the indicator — often from 75% straight to 20% without warning. One complete charge-discharge cycle from the camera body resets the reference and stabilises the readout. After that cycle, the indicator tracks accurately through the full discharge range.
GZ-HD40 powering off before the indicator reaches zero
This happens when the BMS cutoff threshold in the camera body is slightly higher than what the replacement cell holds at end-of-discharge. The GZ-HD40 reads terminal voltage — not state of charge directly — and trips the shutdown relay early if voltage drops faster than expected under load from the HD sensor and image processor. The fix is to confirm the cell voltage with a multimeter at the point of cutoff: if it's reading above 6.8V at shutdown, the body's cutoff is set conservatively and this is normal behaviour. If it's cutting off above 7.0V on a fresh cell, cycle the battery twice through the body to let the BMS recalibrate its floor.
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 shows a dead battery icon right after I put in a new charged cell — is the battery faulty?
Not necessarily. The GR-D796 BMS sometimes rejects a new cell's voltage signature on first install if it hasn't seen a charge cycle from within the body or OEM charger. Remove the battery, place it in the JVC charger until the charge light clears, then reinsert. That single charge cycle is usually enough for the body to accept the cell and display correctly.
The battery percentage on my GZ-HD40 jumps from 60% to 5% in a few seconds — what's happening?
The GZ-HD40 maps its percentage readout to fixed voltage thresholds tuned for a conditioned cell. A new replacement discharges along a slightly different voltage curve, so the body misreads the thresholds and skips indicator steps. Run one full charge-to-discharge cycle through the camera body. After that single cycle, the voltage curve aligns to the body's reference map and the percentage display stabilises.
The replacement cell runs out faster when I'm shooting in cold weather — is this a defect?
It isn't a defect — it's a known characteristic of Li-ion chemistry below 10°C. Internal resistance rises as temperature drops, which increases voltage sag under the combined draw of the GR-D796's tape transport, LCD, and sensor. The cell still holds its rated 800mAh at room temperature. Keep the battery in an inner pocket between takes to maintain cell temperature, and you'll recover most of the capacity loss.
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