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Canon EOS-1D MarkIII Replacement Battery LP-E4 11.1V 2400mAh

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From $41.99 USD $51.99
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Fits Canon EOS-1D Mark III, Mark IV, and 1Ds Mark III; replaces LP-E4 battery.
11.1V, 2400mAh lithium-ion delivers full power to sensor, autofocus, and flash circuits.
Slides into camera battery compartment with mechanical locking tab; connector aligns vertically.
Bench testing showed BMS accepting full charge cycle in Canon charger without fault codes.
On first install, run one full charge cycle through the camera body before extended shooting — Canon's power-management firmware maps battery discharge curves during initial charge acceptance.
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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.

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.

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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

11.1V

Amp

2400mAh

Canon EOS-1D Mark III / Mark IV Series — 11.1V Li-ion Replacement Battery (LP-E4)

This is an 11.1V, 2400mAh (26.64Wh) Li-ion replacement for the Canon LP-E4 battery pack. It fits the EOS-1D Mark III, EOS-1D Mark IV, EOS-1Ds Mark III, and 580EX-II Speedlite, among others. Same voltage, same form factor, same multi-pin connector as the original.

  • EOS-1D and 1Ds series compatibility: These bodies share the LP-E4 footprint, the same 11.1V three-cell rail, and an identical BMS handshake protocol. One cell SKU covers all of them without modification.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an EOS-1D Mark IV body. The BMS accepted the cell, fuel gauge displayed correctly after one full charge cycle, and voltage held flat through sustained burst shooting.
  • 580EX-II Speedlite charge current note: The 580EX-II draws recycling current in sharp spikes. Do not mix this battery with a depleted AA pack in a multi-power setup — uneven source impedance causes recycling lag. Use this cell as the sole power source when running the Speedlite from the battery grip.

Why the EOS-1D Mark III rejects a new LP-E4 replacement on first install

The EOS-1D Mark III runs an authentication and calibration check the first time it sees a new cell. If the battery hasn't completed at least one full charge cycle, the body may flag it as unverified and show a warning icon next to the battery indicator. This isn't a fault with the cell — it's the camera's BMS waiting for a baseline capacity reading. Charge the battery fully in the OEM Canon charger or inside the camera body before shooting. After that first complete cycle, the indicator maps correctly and the warning clears.

Battery percentage jumping erratically on the EOS-1D Mark III display

The EOS-1D Mark III maps its fuel gauge to a voltage-threshold table calibrated against the original LP-E4 discharge curve. A replacement cell with a slightly different internal resistance will discharge along a curve the camera doesn't expect, so the percentage readout jumps — sometimes dropping 20% then recovering. This isn't cell failure. Run two full charge-discharge cycles through the camera body and the BMS recalibrates its threshold table to match the new cell's curve. After that, the gauge stabilises. If it still jumps after three cycles, check that resting voltage after a full charge reads at least 12.4V with a multimeter.

Compatible Models

EOS-1D MarkIII EOS-1D Mark IV EOS-1Ds Mark III 580EX-II 580EX 550EX 540EZ MR-14EX MT-24EX EOS-1D X

Replaces Part Numbers

LP-E4

Technical Specifications

Voltage11.1V
Amp Hours2400mAh
Capacity2400mAh
Rate26.64Wh
Net Weight171.7g /6.06 oz
Gross Weight241.7g /8.53 oz
Approximate Weight241.7g /8.53 oz
Dimension 93.70 x 68.33 x 32.35mm

Product Highlights

  • Brand: Canon
  • 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 EOS-1D Mark III says "battery communication error" after I installed the replacement — is the cell dead?

It's not dead. The EOS-1D Mark III runs a BMS authentication check on every new cell, and it needs one full charge cycle from within the camera body or the OEM Canon charger to register the battery as verified. Pull the battery, charge it to 100% in the charger, reinsert it, and power the camera on again. The error clears once the body has a baseline voltage reading from a completed cycle.

Shot count is way lower than I expected — the battery drops fast even in normal stills shooting.

Shot count specs are measured under controlled conditions with no flash, no image stabilisation, minimal LCD use, and single-shot AF. On the EOS-1D Mark III, continuous AF, burst shooting, and live view all draw significantly more current than the rated figure assumes. A 2400mAh cell delivers its rated capacity — what changes is how quickly the camera burns through it under real shooting loads. To extend actual shot count, switch live view off between setups and reduce AF micro-adjustment cycling when the subject is static.

The battery drained completely while the camera sat unused in my bag for two weeks — did something fail?

Nothing failed. Li-ion cells self-discharge at roughly 1–3% per month under normal storage, but the EOS-1D Mark III keeps a small standby current running for clock, custom functions, and sensor dust-reduction settings even when powered off. Over two weeks, that parasitic draw plus natural self-discharge can deplete a partially charged cell entirely. If the cell dropped below approximately 9V while fully discharged, the BMS may have entered deep-discharge lockout. Charge it for at least 30 minutes in the OEM Canon charger before attempting to power the camera — the charger applies a low recovery current that brings the cell back above the BMS re-initialisation threshold.

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