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Sony NP-900 Replacement Battery 3.7V 600mAh Li-ion

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From $22.99 USD $28.99
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Fits Sony NP-900 and OEM part numbers 02491-0015-00, BATS4, 02491-0037-00 for Cyber-shot and Alpha cameras.
3.7V, 600mAh lithium-ion cell delivers standard capacity for early 2000s Sony digital camera bodies.
Connector seats flush into camera battery slot with positive terminal contact — no adapter needed.
Bench test on DA 5092 body showed clean voltage ramp on first insertion with no BMS rejection.
On first load into the camera body, run one full charge cycle through the camera itself before heavy shooting — Sony BMS systems from this era require internal charge acknowledgment to display accurate battery percentage.
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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

3.7V

Amp

600mAh

AOSTA DA 5092 Series — 3.7V Li-ion Replacement Battery (NP-900)

This is a 3.7V, 600mAh Li-ion battery built to the NP-900 footprint. It fits the AOSTA DA 5092, DA 5091, DA 5094, and DA 4092 digital cameras. Physical dimensions are 43.70 x 31.30 x 7.00mm — same as the original cell.

  • DA 5091 / 5092 / 5094 / 4092 fit group: These four models share the same NP-900 contact layout, voltage rail, and BMS handshake requirements. One replacement cell covers all four without modification.
  • Bench tested on actual hardware: We cycled this cell through the OEM charger and camera body. The BMS accepted the cell on first charge. Voltage held at 3.7V nominal under standard photo capture draw with no cutoff events recorded.
  • First-cycle protocol on NP-900 cameras: Run the first full charge cycle inside the camera body or OEM charger before shooting. Some compact camera BMS systems from this era calibrate the battery-remaining display only after completing one full charge from within the device itself.

Camera showing dead battery indicator on a partially charged replacement cell

Early 2000s compact camera BMS units map battery percentage against a fixed voltage-discharge curve stored in firmware. A new Li-ion cell has a slightly different discharge curve than a worn original, so the camera reads the voltage and maps it incorrectly at first. The indicator can show empty even when the cell holds a substantial charge. One complete charge-discharge cycle resets the camera's internal reference point, and the indicator typically stabilises after that.

Battery percentage jumping erratically during a shoot

This happens when the camera's voltage threshold map doesn't align with the new cell's discharge curve. The BMS samples terminal voltage and converts it to a percentage, but compact cameras at this voltage class use coarse sampling — often just three or four threshold points. If the new cell drops through two thresholds in quick succession under flash recharge load, the display jumps. Discharge the cell fully, then charge it completely in the OEM charger. After one full cycle the thresholds settle and the readout stabilises.

Compatible Models

DA 5092 DA 5091 DA 5094 DA 4092

Replaces Part Numbers

NP-900 02491-0015-00 BATS4 02491-0037-00

Technical Specifications

Voltage3.7V
Amp Hours600mAh
Capacity600mAh
Rate2.22Wh
Net Weight16g /0.56 oz
Gross Weight41g /1.45 oz
Approximate Weight41g /1.45 oz
Dimension 43.70 x 31.30 x 7.00mm

Product Highlights

  • Brand: AOSTA
  • 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 AOSTA DA 5092 says "no battery" or won't turn on after I installed the replacement — what's wrong?

The NP-900 BMS on this camera series sometimes rejects a new cell on cold install. Place the battery in the OEM charger first and run a full charge before inserting it into the camera body. If the camera still shows no battery, insert the charged cell and hold the power button for a full three seconds — the body needs a firm power-on signal to re-initialise the battery detection circuit. This clears on the first accepted charge cycle.

The flash takes much longer to recycle between shots with the new battery than it did with the original — is the cell faulty?

Flash recycling time is directly tied to the capacitor recharge current the battery can sustain. At 600mAh and 3.7V, this cell sits at the rated spec for these cameras, but if the battery is not fully charged, available current drops and the capacitor recharges more slowly. Top the cell to full charge and test again. If recycling is still slow, check that the battery contacts on the camera body are clean and making firm contact — oxidised contacts add resistance and limit recharge current.

Shot count is lower than I expected — the battery seems to run down faster than the original did when it was new.

Flash, continuous autofocus, and LCD brightness are the biggest draws on a 600mAh cell — far more than shutter actuation alone. If any of those are running at maximum, the usable shot count drops significantly compared to a spec sheet figure measured under minimal-load conditions. Lower LCD brightness, switch AF to single-shot mode, and limit flash to when it's needed. If the cell still depletes unusually fast after a full charge cycle, check that it was fully charged to 4.2V before shooting — a partial first charge can mask the cell's actual capacity until after the first complete cycle.

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