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Rectangular lithium-ion camera battery, dark grey plastic casing, gold contacts visible

Cameron Sino DMW-BLJ31 camera battery 3400mAh 25.16Wh

SKU CH-6S8J-C9AFS

Replacement lithium-ion battery for Lumix DC-S1, DC-S1R, S1 and S1R cameras, 3400mAh capacity with built-in protection

  • Total capacity3,400 mAh / 25.16 Wh
  • Pack contents72.56 × 41.6 × 21.26
  • Battery chemistryLithium ion
  • Product typeLithium ion
  • Compatible withCamera
  • Longer shoots from 3400mAh 25.16Wh capacity
  • Reliable power with 7.4V lithium-ion chemistry
  • Fits Lumix S1 S1R DC-S1 DC-S1R models
  • Protected against overcharge over-discharge short-circuit
  • Compact 72.56x41.60x21.26mm design weighs 112.5g

Compatible Lumix S-Series Power

This lithium-ion replacement battery fits the Lumix DC-S1, DC-S1R, S1 and S1R cameras using part numbers DMW-BLJ31 or DMW-BLJ31E. It delivers a 3400mAh capacity at 7.4V for 25.16Wh of energy. The fully decoded chip communicates with the camera exactly like the original unit.

Sustained Shooting Performance

The 3400mAh rating supports extended capture sessions without the voltage sag seen in lower-capacity cells. Overcharge, over-discharge, over-voltage and short-circuit protection circuits maintain stable output throughout the discharge curve. A new cell reaches its full runtime after two or three complete charge cycles.

Build and Daily Handling

The pack measures 72.56 x 41.60 x 21.26mm and weighs 112.5g, matching the original form factor for a secure fit in the camera grip. Shock-absorbing foam in the packaging protects the cell during transport. ISO9001, RoHS and CE certifications confirm compliance with safety and environmental standards.

How it compares

Measured against everything we stock in Camera Batteries, Grips & Chargers, at today’s prices. Recalculated every night.

Price $16.99
Typical for this category: the median of 5,900 items is $17.99.

Specifications

Product
Brand nameCameron sino
Model nameLumix DC-S1, Lumix DC-S1R, Lumix S1, Lumix S1R
Part numberDMW-BLJ31, DMW-BLJ31E
Total capacity3,400 mAh / 25.16 Wh
Product typeLithium ion
Power
Battery chemistryLithium ion
Compatibility
Compatible withCamera
In the box
Pack contents72.56 × 41.6 × 21.26

Questions about this item

Does the 7.4 V 3400 mAh lithium-ion cell run hot during long shoots?

The battery uses standard lithium-ion chemistry with built-in over-heat and over-voltage protection; normal continuous use stays within safe temperature limits.

What charger do I already need to power the DMW-BLJ31?

Any Panasonic Lumix charger that supports the original DMW-BLJ31 or a compatible third-party charger with the same 7.4 V lithium-ion interface will work.

Will this 72.56 × 41.60 × 21.26 mm pack fit my older Lumix S1 body without modification?

Yes, the dimensions and fully decoded chip match the original DMW-BLJ31, so it seats and communicates exactly like the factory battery.

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