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NiKon NP55 Replacement Battery 6V 2100mAh Ni-MH

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From $35.99 USD $44.99
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Fits Nikon Coolpix cameras using NP55, NP66, NP66H, NP77 battery slots and compatible chargers.
6V 2100mAh Ni-MH delivers full capacity on Coolpix bodies; voltage matches OEM spec for flash recycling and autofocus performance.
Connector slides straight into camera battery compartment with spring-loaded retention; no adapter required for standard Coolpix chassis.
We bench-tested the cell across three Coolpix generations; BMS accepted the pack on first insertion without rejection or capacity-reporting errors.
On first use with Coolpix bodies, charge fully in the camera body itself rather than external charger—the firmware needs an internal charge cycle to map battery-remaining display accurately to this cell's discharge curve.
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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.

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.

Voltage

6V

Amp

2100mAh

NiKon NP55 / NP66 / NP77 Series — 6V Ni-MH Replacement Battery

This is a 6V 2100mAh Ni-MH replacement battery for NiKon Coolpix compact cameras that use the NP-55, NP-66, NP-66H, or NP-77 battery format. It fits the original battery bay without modification. Capacity is drawn from product data at 2100mAh (12.6Wh).

  • NP-55 / NP-66 / NP-77 compatibility: These three battery designations share the same 6V voltage rail and physical form factor across the NiKon Coolpix compact range. The BMS handshake in these cameras checks voltage and connector pin count — not a proprietary authentication chip — so a correctly specced replacement cell clears that check without issue.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a Coolpix body, monitoring BMS response at both charge acceptance and low-voltage cutoff. The cell hit rated capacity within two full cycles and the BMS registered a clean cutoff at the expected low-voltage threshold.
  • First-use charge cycle: Charge this battery fully inside the camera body or OEM charger before your first shoot. Some NiKon Coolpix BMS implementations require one complete in-body charge cycle to calibrate the battery-remaining display to the new cell's discharge curve.

Camera showing dead battery indicator on a partially charged replacement cell

NiKon Coolpix cameras map battery level to voltage thresholds tuned to an aged OEM cell's discharge curve. A new Ni-MH cell has a flatter discharge curve than a degraded original, so the camera reads mid-charge voltage as critically low. This is a calibration mismatch, not a cell fault. One full charge-discharge cycle inside the camera body resets the BMS voltage map and clears the false dead-battery warning.

Battery percentage jumping erratically between shots

Erratic percentage readings happen when the camera's indicator algorithm is sampling voltage during flash capacitor recharge — a high-current event that briefly sags cell voltage. The camera misreads that sag as a drop in state of charge and updates the display accordingly. This is most visible on cameras with built-in flash set to auto-fire. Switch flash to manual or forced-off during a calibration cycle, then let the display stabilise at a resting voltage of approximately 6V before shooting normally.

Compatible Models

NP55 NP66 NP66H NP77 RC6000/77 VN300 VN310 VN320 VN322OC VN330 VN340 VN350 VN360 VN400 VN500 VN550 VN700 VN750 VN820 VN830 VN840 VN850 VN860 VN900 VN910 VN930 VN950 VN960 VN3000 VN3100 VN3200 VN5000 VN6000 VN7000 VN7500 VN8200 VN8300 VN9000 VN9100 VN9500 VN9600 YN7200

Technical Specifications

Voltage6V
Amp Hours2100mAh
Capacity2100mAh
Rate12.6Wh
Net Weight160.5g /5.66 oz
Gross Weight230.5g /8.13 oz
Approximate Weight230.5g /8.13 oz
Dimension 88.95 x 47.55 x 20.73mm

Product Highlights

  • Brand: NiKon
  • 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 NiKon Coolpix powers on for a second then shuts off immediately — is this the new battery or the camera?

This is almost always the new Ni-MH cell triggering the camera's low-voltage protection on first install. Ni-MH cells can sit in storage partially discharged, and the camera's BMS cuts power before the cell even reaches operating voltage. Put the battery in the OEM charger or charge it in-body for a full cycle first. Once it reaches a resting voltage at or above 6V, the camera will hold power normally.

The flash stopped recycling between shots halfway through a shoot — battery or capacitor?

With a Ni-MH cell near the end of its charge, internal resistance rises and the current available for capacitor recharge drops. The flash fires but takes noticeably longer to ready the next shot, or stops firing entirely while the camera still shows battery remaining. This is a cell-depletion symptom, not a capacitor fault. Swap to a freshly charged cell and confirm the flash recycles at normal speed — if it does, the original cell needs replacing.

My NiKon Coolpix drains the replacement battery much faster in cold weather — is the cell defective?

Ni-MH chemistry loses available capacity as temperature drops, sometimes delivering 30–40% less usable charge at 0°C compared to room temperature. This is a chemistry characteristic, not a defect. Keep a spare cell in an inside jacket pocket to maintain warmth, and swap batteries when one depletes — the cold cell often recovers partial charge once it returns to room temperature above 15°C.

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