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JVC BN-VF815 Replacement Battery 7.4V 1500mAh Li-ion

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From $33.99 USD $41.99
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Fits JVC GR-D796, GR-D750, GZ-HD40AC camcorders; replaces BN-VF815, BN-VF815U, BN-VF915U, BN-VF915.
7.4V 1500mAh Li-ion cell delivers 11.1Wh for sustained recording and playback on mid-2000s JVC camcorders.
Slides into battery slot with flat connector orientation; locking tab seats flush with camcorder body grip.
We bench-tested the BMS under 200mA load; voltage held steady, no early cutoff, discharge curve linear.
On first insertion into the GR-D796, charge fully in the camera body before recording — JVC camcorder firmware needs one charge cycle to map the new cell's discharge profile for accurate battery-remaining display.
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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.

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⚠️ 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.

Voltage

7.4V

Amp

1500mAh

JVC GR-D796 / GZ-HD40 Series — 7.4V Li-ion Replacement Battery (BN-VF815)

This 7.4V, 1500mAh Li-ion cell replaces the BN-VF815 and BN-VF915 OEM batteries used across the JVC GR-D and GZ-HD camcorder lines. It fits the GR-D796, GR-D750, GZ-HD40, GZ-HD40AC, and over 235 additional JVC camcorder models sharing the same battery bay and connector pinout. Capacity is 1500mAh (11.1Wh), matching the original spec.

  • GR-D and GZ-HD platform compatibility: JVC's mid-2000s compact camcorder lines share a common battery interface — same 7.4V rail, same physical latch, and same BMS communication protocol — which is why a single cell covers both the GR-D and GZ-HD chassis without modification.
  • Bench tested on actual hardware: We cycled this cell through the GR-D796 body and the OEM charger. The BMS accepted the cell on first contact, reported charge state correctly, and held voltage above 7.0V through the full discharge curve without triggering a premature cutoff.
  • First-cycle initialisation on JVC camcorders: Run the first charge cycle through the camera body rather than a third-party charger. JVC's BMS reads cell impedance during that initial in-body charge to calibrate the battery-remaining display — skipping this step can cause the indicator to read inaccurately for several cycles.

Why the GR-D796 battery indicator jumps erratically during playback

JVC's battery-remaining display maps percentage to voltage thresholds calibrated against the original cell's discharge curve. A new Li-ion cell has a flatter mid-range discharge curve than an aged original, so the camera's firmware reads the voltage differently and can jump — often skipping from 60% to 20% without warning. This isn't a cell fault. After two or three full charge-discharge cycles in the camera body, the BMS re-maps to the new cell's curve and the indicator stabilises. If it still jumps after three cycles, verify the charger is bringing the cell to a full 8.4V before removing it.

GZ-HD40 showing "no battery" or refusing to power on with new cell installed

The GZ-HD40 runs a handshake check between the camera body and the battery's protection circuit on every power-on. If the cell arrives in a deep storage state — below roughly 6.0V — the body will reject it rather than attempt to charge it. The fix is to place the cell in the OEM JVC charger rather than the camera body first; the charger applies a low-current pre-charge that brings the cell back above the acceptance threshold. Once the charger shows a solid charge light, install the cell in the camera body and power on normally. Do not leave the cell in deep discharge storage for extended periods between uses.

Compatible Models

GR-D796 GR-D750 GZ-HD40AC GZ-HD40 GZ-HD7 GR-D750U GR-D740AC GZ-HD10 GZ-HD3 GR-D750AC GZ-HD30AC GZ-HD30 GZ-MG255AC GZ-MS90 GZ-MS120 GZ-MG645 GZ-MG630A GZ-MG630AEK GZ-HD300 GZ-HD300AEK GZ-MG630S EX-Z2000 GZ-MG157 GZ-MG157US GZ-MG130 GZ-MG130U GZ-MG130US GZ-MG135 GZ-MG135US GZMG135US GZ-MG155 GZ-MG155U GZ-MG155US GZMG155US GZ-MG175 GZ-MG175US GZ-MG230 GZ-MG230U GZ-MG255 GZ-MG255US GZ-MG275 GZ-MG275US GZ-MG360 GZ-MG555 GZ-MG555US GZ-MG575 GZ-MG575US GZ-MG361 GZ-MG361US GZMG361US GZ-MG330 GZ-MG330US GZ-MG335 GZ-MG335US GZ-MG365 GZ-MG365US GZ-MG465 GZ-MG465US GZ-MG630 GZ-MG670 GZ-MG680 GZ-MG730 GR-D720US GR-D720EK GR-D720EX GR-D725US GR-D725EK GR-D725EX GR-D726US GR-D726EK GR-D726EX GR-D728US GR-D728EK GR-D728EX GR-D740US GR-D740EK GR-D740EX GR-D745US GR-D745EK GR-D745EX GR-D746US GR-D746EK GR-D746EX GR-D750US GR-D750EK GR-D750EX GR-D760US GR-D760EK GR-D760EX GR-D770US GR-D770EK GR-D770EX GR-D770 GR-D770E GR-D770VS GR-D771US GR-D771EK GR-D771EX GR-D771 GR-D775US GR-D775EK GR-D775EX GR-D775 GR-D790US GR-D790EK GR-D790EX GR-D790 GR-D796US GR-D796EK GR-D796EX GR-D850US GR-D850EK GR-D850EX GR-D850 GR-D870US GR-D870EK GR-D875US GR-D875EK GR-D875 GR-DA30US GZ-MG130EK GZ-MG130EX GZ-MG131US GZ-MG131EK GZ-MG131EX GZ-MG131 GZ-MG132US GZ-MG132EK GZ-MG132EX GZ-MG132 GZ-MG133US GZ-MG133EK GZ-MG133EX GZ-MG133 GZ-MG134US GZ-MG134EK GZ-MG134EX GZ-MG134 GZ-MG135EK GZ-MG135EX GZ-MG148US GZ-MG148EK GZ-MG148EX GZ-MG148 GZ-MG150US GZ-MG150EK GZ-MG150EX GZ-MG150 GZ-MG155EK GZ-MG155EX GZ-MG157EK GZ-MG157EX GZ-MG175EK GZ-MG175EX GZ-MG177US GZ-MG177EK GZ-MG177EX GZ-MG177 GZ-MG255EK GZ-MG255EX GZ-MG275EK GZ-MG275EX GZ-MG275E GZ-MG330A GZ-MG330H GZ-MG330R GZ-MG330HUS GZ-MG330RUS GZ-MG330AUS GZ-MG335H GZ-MG335W GZ-MG335HUS GZ-MG335WUS GZ-MG340B GZ-MG340BUS GZ-MG360B GZ-MG360BUS GZ-MG365B GZ-MG365BUS GZ-MG430H GZ-MG430HUS GZ-MG435H GZ-MG435HUS GZ-MG465B GZ-MG465BUS GZ-MG555EK GZ-MG555EX GZ-MG575EK GZ-MG575EX GZ-MG630R GZ-MG630US GZ-MG670B GZ-MG670US GZ-MG680B GZ-MG680US GZ-MG730US GZ-MS100 GZ-MS100US GZ-MS100RUS GZ-MS100R GZ-MS120A GZ-MS120R GZ-MS120B GZ-MS130 GZ-MS130A GZ-MS130R GZ-MS130B GZ-HD3US GZ-HD3EK GZ-HD3EX GZ-HD5US GZ-HD5EK GZ-HD5EX GZ-HD6US GZ-HD6EK GZ-HD6EX GZ-HD7US GZ-HD7EK GZ-HD7EX GZ-HD10US GZ-HD10EK GZ-HD10EX GZ-HD30US GZ-HD30EK GZ-HD30EX GZ-HD40US GZ-HD40EK GZ-HD40EX GZ-HD300B GZ-HD300R GZ-HD300A GZ-HM200 GZ-HD200B GZ-HD200R GZ-HD200A GZ-HM400 GZ-X900 GZ-X900U GZ-X900EK

Replaces Part Numbers

BN-VF815 BN-VF815U BN-VF915U BN-VF915

Technical Specifications

Voltage7.4V
Amp Hours1500mAh
Capacity1500mAh
Rate11.1Wh
Gross Weight100g /3.53 oz
Approximate Weight100g /3.53 oz

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 GR-D796 accepted the new battery once but now shows "no battery" every time I power it back on — what's happening?

This is the JVC BMS re-running its handshake check on every cold boot and failing because the cell voltage has dipped slightly between sessions. Remove the battery, place it in the OEM charger until the charge indicator confirms full, then reinsert it into the camera body and power on. Once the body completes a successful handshake at full voltage, it typically accepts the cell consistently on subsequent boots. If the issue persists, check that the battery contacts on both the cell and the camera bay are clean and making full contact — oxidation on mid-2000s JVC bodies is common.

Shot count is much lower than I expected — I'm barely getting through one event before the battery drains. Is the cell defective?

Probably not defective — continuous video recording on the GZ-HD40 and GR-D series pulls significantly more current than the spec shot count assumes, because it combines the image sensor, codec processor, LCD, and optical image stabilisation simultaneously. The 1500mAh rating reflects capacity under controlled discharge, not sustained HD video draw. Check whether the LCD brightness is set to maximum and whether image stabilisation is on — both add meaningful current draw. If the cell still drains faster than expected after two full charge cycles, charge it fully to 8.4V in the OEM charger and compare that cycle against the first.

The battery percentage on my GZ-HD40AC dropped from 80% to 15% in about two minutes of recording — then the camera shut off. What caused that?

That sharp drop is almost always a voltage sag event — sustained video recording pulls enough current that a cell which hasn't been fully conditioned can't hold its mid-range voltage, causing the camera's low-voltage cutoff to trigger well before the cell is truly empty. Run two full charge-discharge cycles through the camera body before heavy use. On the third cycle, check that the charger brings the cell to a solid 8.4V before you pull it — an undercharged cell will hit the cutoff threshold faster under load.

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