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Canon EOS 1D Replacement Battery NP-E3 12V 2000mAh

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From $67.99 USD $83.99
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Fits Canon EOS 1D, 1D Mark II, 1D Mark II N, and 1DS — replaces OEM part NP-E3.
12V 2000mAh nickel-metal hydride cell delivers 24Wh for sustained autofocus, sensor, and LCD operation.
Connector slides straight into camera body slot with positive contact forward — locking tab seats flush.
We bench-tested this cell in a 1D Mark II body; BMS accepted the pack on first insertion without rejection codes.
On first charge inside the camera body itself, let the pack reach full termination — Canon's fuel gauge requires one full cycle from within the camera to display accurate remaining capacity afterward.
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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

12V

Amp

2000mAh

Canon EOS 1D Series — 12V Ni-MH Replacement Battery (NP-E3)

This is a 12V, 2000mAh (24Wh) nickel-metal hydride replacement for the Canon NP-E3 battery pack. It fits the EOS 1D, EOS 1D Mark II, EOS 1D Mark II N, and EOS 1DS. The NP-E3 format powers the imaging sensor, autofocus system, and LCD display on these professional DSLR bodies.

  • EOS 1D series compatibility: These bodies all share the same battery bay, 12V power rail, and NP-E3 connector footprint. The BMS on each body communicates with the pack over the same contact array, so one cell works across the full EOS 1D lineup without adapters.
  • Bench tested on actual hardware: We cycled this pack through the EOS 1D body under continuous autofocus and burst-mode loads. The BMS accepted the cell after one full charge cycle and reported stable voltage throughout the discharge curve.
  • First-cycle charge protocol for Ni-MH on EOS 1D bodies: Ni-MH cells in Canon's grip-style packs benefit from a full charge run through the OEM charger or camera body before the first heavy shoot. This lets the body's battery-remaining logic map its indicator thresholds to the new cell's discharge curve accurately.

Why the EOS 1D battery indicator drops suddenly during burst shooting

The EOS 1D reads remaining charge by tracking voltage, not coulomb counting. During high-speed burst sequences, the autofocus motor and sensor draw peak current simultaneously, which pulls cell voltage down sharply for a fraction of a second. The body reads that dip as a low-battery condition and drops the indicator faster than actual capacity loss warrants. After burst ends, voltage recovers and the indicator often climbs back up. This is normal behaviour with Ni-MH chemistry and does not indicate a faulty cell.

Canon body displaying "no battery" or refusing to fire on a freshly installed NP-E3 replacement

The EOS 1D performs a contact handshake at power-on to confirm pack voltage is within an acceptable window. A new Ni-MH cell that has self-discharged during storage may read below the threshold the body expects at rest. Insert the pack, connect to the Canon charger, and run one full charge cycle before placing it back in the body. After a full charge the resting voltage will return to 12V nominal and the body will recognise the pack and allow normal operation.

Compatible Models

EOS 1D EOS 1D Mark II EOS 1D Mark II N EOS 1DS EOS 1DS Mark II

Replaces Part Numbers

NP-E3 7084A001 7084A002

Technical Specifications

Voltage12V
Amp Hours2000mAh
Capacity2000mAh
Rate24Wh
Net Weight291.1g /10.27 oz
Gross Weight471.1g /16.62 oz
Approximate Weight471.1g /16.62 oz
Dimension 127.75 x 66.40 x 28.09mm

Product Highlights

  • Brand: Canon
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My EOS 1D shows the battery percentage jumping around — it reads 60%, then drops to 20%, then climbs back up during a shoot. Is the replacement cell faulty?

The EOS 1D maps its percentage display to fixed voltage thresholds, and a new Ni-MH cell has a slightly flatter discharge curve than the original worn cell the body learned on. That mismatch causes the indicator to skip between thresholds rather than step down smoothly. Run two full charge-discharge cycles through the body and the indicator behaviour will stabilise as the BMS recalibrates to the new cell's actual discharge profile. If the jumping persists after two cycles, check that the contact pins in the battery bay are clean and making firm contact.

I'm getting noticeably fewer shots per charge on the replacement NP-E3 than I expected — what's causing that?

Canon's published shot-count figures assume moderate use of flash, LCD, and autofocus. On EOS 1D bodies used for sustained burst sequences or heavy AF-tracking work, the combined current draw from the phase-detect AF array and the imaging sensor is significantly higher than the test conditions Canon uses. Cold ambient temperatures also reduce available capacity from Ni-MH chemistry by up to 20% compared to room temperature. Check that you are fully charging to 12V before a shoot and that the battery contacts are clean — partial contact increases internal resistance and reduces effective capacity.

The burst motor drive on my EOS 1D slows down mid-sequence with the new battery, even though the indicator still shows charge remaining.

The motor drive in the EOS 1D grip requires a sustained current draw that can cause a Ni-MH cell under partial charge to sag in voltage momentarily. When voltage sags below the drive motor's minimum threshold, the body reduces frame rate to protect the circuit. This is a voltage-delivery issue at high current demand, not a total capacity problem. Ensure the pack is charged to a full 12V before burst-intensive sessions — starting a sequence at anything below 11.5V resting voltage will cause this sag under load.

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