- 3560mAh Lithium-Ion Cell supplies hundreds of shots per charge for full-day shooting without swapping batteries mid-session
- 13Wh Energy Output matches OEM specification so your camera's runtime meter reads accurately and you know exactly how much power remains
- Compatible with Panasonic DC-S1, DC-S1H and DC-S1R full-frame mirrorless bodies as a direct DMW-BLJ31 equivalent
- 3.7V Nominal Voltage meets manufacturer electrical requirements for safe operation and correct power delivery to camera circuits
- 145g Weight and 72mm x 41mm x 21mm Dimensions mirror original battery form factor for secure fit in the camera grip
- Lithium-Ion Chemistry optimises after 3 initial charge cycles, reaching full capacity and stable discharge characteristics
- 1-Year Warranty covers manufacturing defects and performance issues for confidence in long-term reliability
- OEM-Equivalent Engineering ensures compatibility with Panasonic's battery management system and on-screen charge indicators
- Rigorous Testing Protocol validates electrical safety, thermal performance and charge retention before shipping
- Drop-In Replacement requires no firmware updates or adapter plates, works immediately in any compatible Panasonic body
Power Management for Lumix S-Series Bodies
When you're shooting with a Panasonic Lumix S1, S1R, S1H or S5, battery capacity directly determines how long you stay operational between charges. This 2-Power replacement delivers 3250mAh at 7.2V, matching the energy density of the Panasonic DMW-BLJ31 it replaces, so you get comparable runtime whether you're capturing stills through a day-long event or recording extended 4K video takes. The lithium-ion cell chemistry provides stable voltage output across the discharge curve, which matters when you're relying on consistent autofocus performance and electronic viewfinder refresh rates during critical moments.
Compatibility and Fit
This cell is engineered as a direct mechanical and electrical equivalent for the DMW-BLJ31. The contact array, physical dimensions and locking mechanism align precisely with the battery bay in compatible Lumix bodies, so insertion is secure and communication with the camera's power management system works as expected. The camera will read charge state accurately and display remaining capacity in the usual way. You're not adapting or working around anything, it drops in and functions exactly like the original Panasonic part.
Build Quality and Safety Standards
Every 2-Power camera battery undergoes testing for overcharge protection, short-circuit prevention and thermal stability. The internal protection circuit monitors cell voltage and temperature, cutting power if parameters move outside safe operating ranges. This isn't a budget cell with minimal safeguards; it's a properly engineered replacement that meets the same safety benchmarks you'd expect from OEM hardware. The outer casing is impact-resistant ABS, and the terminals are plated to resist corrosion over repeated charge cycles.
Charge Cycle Performance
Lithium-ion cells reach optimal performance after the first few charge and discharge cycles as the internal chemistry stabilises. You may notice slightly shorter runtime on the first use; this is normal and resolves by the third or fourth cycle. From that point, the cell will deliver its full rated capacity. Avoid leaving the battery fully discharged for extended periods, lithium-ion chemistry degrades faster when stored at very low charge states. For long-term storage between shoots, keep the cell at around 40-60 per cent charge in a cool, dry location.
Why a Second Battery Matters
Full-frame mirrorless bodies like the Lumix S-series draw more power than DSLRs because the sensor, EVF and rear screen are active continuously. A single battery rarely covers a full day of mixed shooting, especially if you're working in cold conditions (which accelerate discharge) or recording video (which keeps the sensor and processor under sustained load). Carrying a spare means you can swap out mid-shoot without interrupting your workflow or hunting for a mains socket. If you're travelling, having a second cell also reduces dependency on finding compatible charging infrastructure in unfamiliar locations.
Warranty and Support
This replacement is covered by a 1-year limited warranty from 2-Power. If the cell fails to hold charge, develops a fault, or exhibits any manufacturing defect within that period, the warranty provides a straightforward resolution. That level of backing reflects the brand's confidence in the product's reliability and gives you recourse if something goes wrong, which is not always the case with unbranded third-party cells.
Practical Considerations
If you're running a two-camera setup for events or interviews, standardising on compatible batteries simplifies your kit. You can charge multiple cells overnight using the same charger and swap them between bodies as needed. Label each battery with a small piece of tape or a marker dot so you can track charge cycles and rotate them evenly, this extends the overall lifespan of your battery pool. When you're packing for a shoot, a quick visual check confirms which cells are charged and which need topping up.
This 2-Power equivalent for the Panasonic DMW-BLJ31 gives you the runtime and reliability you need to keep shooting without the cost of buying another OEM cell. It's a practical, well-engineered solution for anyone operating Lumix S-series bodies who wants dependable backup power, DBI1013A.
