Sony NEX-5 Replacement Battery NP-FW50 7.4V 1080mAh
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Sony NEX-5 Replacement Battery NP-FW50 7.4V 1080mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Sony NEX-5 Replacement Battery NP-FW50 7.4V 1080mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
1080mAh
Sony NEX-5 / NEX-5A / NEX-5K / NEX-5D — 7.4V Li-ion Replacement Battery (NP-FW50)
This is a 7.4V, 1080mAh Li-ion replacement for the Sony NP-FW50 battery. It fits the NEX-5, NEX-5A, NEX-5K, NEX-5D, and over 90 additional Sony mirrorless and compact system camera bodies that share the NP-FW50 footprint. Capacity is rated at 7.99Wh, matching the original cell's power envelope.
- NEX-5 series compatibility: The NEX-5, NEX-5A, NEX-5K, and NEX-5D share the same NP-FW50 battery bay, voltage rail, and BMS communication protocol. All four bodies run the same firmware-level battery authentication check on power-on, so one cell covers the full range without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a NEX-5 body. The BMS accepted the cell after one full charge via the OEM charger, and the battery-remaining indicator tracked consistently across the discharge curve.
- First-cycle BMS calibration on the NEX-5: On first install, charge this battery fully inside the camera body or via the OEM BC-VW1 charger before shooting. The NEX-5's battery indicator maps percentage to voltage thresholds learned during that first cycle — skipping it can cause the display to read inaccurately for several sessions.
Why the NEX-5 battery percentage drops suddenly near 30%
The NEX-5 maps its battery percentage display to a fixed voltage-threshold table calibrated to the original NP-FW50 discharge curve. Replacement cells with a slightly different mid-discharge voltage profile can cause the indicator to hold steady, then drop sharply when the cell hits a threshold the camera doesn't expect. This is a display mapping issue, not a cell fault. Run one full charge-discharge cycle in the camera body and the indicator typically stabilises within two to three sessions.
Sony NEX-5 displaying "incompatible battery" on a valid NP-FW50 replacement
The NEX-5 runs an authentication handshake on power-on that checks cell voltage and BMS response. A new replacement cell that ships partially discharged can fall below the camera's minimum acceptance threshold, triggering the incompatible warning even though the cell is functional. Remove the battery, charge it fully in the OEM BC-VW1 charger or a known-good third-party NP-FW50 charger, then reinsert. If the camera accepts it at full charge, the cell is good — the fix is to get it above 8.2V before first use in the body.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Sony
- 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 NEX-5 shot count dropped way below what I was getting with the original battery — is the replacement cell faulty?
Probably not faulty. The NEX-5's rated shot count assumes minimal flash use, a warm environment, and short bursts — add continuous autofocus, EVF use, image stabilisation, and any video recording and draw climbs well above that baseline. A new replacement cell also performs below its capacity ceiling for the first few cycles before the BMS fully maps the discharge curve. Run five to ten full charge-discharge cycles and track shot count — it should climb toward the rated figure as the cell settles.
The battery percentage on my NEX-5 is jumping around erratically — one minute it says 60%, then it drops to 20% without warning.
This is a voltage-threshold mismatch between the camera's indicator table and the replacement cell's actual discharge curve. The NEX-5 reads a handful of fixed voltage points and converts them to percentage steps — if the new cell holds a slightly different voltage at mid-discharge than the OEM cell, the jumps look erratic even though the cell is delivering current normally. Perform one full charge cycle inside the camera body using the OEM BC-VW1 charger, then discharge fully in-camera. Repeat twice and the indicator mapping typically stabilises.
My NEX-5 battery drains noticeably faster in cold weather — is this a defect?
Not a defect. Li-ion cells lose available capacity as temperature drops because lithium-ion mobility through the electrolyte slows below around 10°C. On a NEX-5, this shows up as a faster-than-expected battery drain and sometimes an early low-battery warning, both of which recover when the cell warms up. Keep a spare battery in an inside pocket when shooting in cold conditions and swap it in when the camera warns low — the "depleted" cell will often recover usable capacity once it returns to room temperature.
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