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Green Extreme DMW-BLJ31 lithium-ion camera battery, rectangular black plastic casing with gold contacts

Green Extreme Battery

Green Extreme DMW-BLJ31 Camera Battery 7.4V 3500mAh

SKU CH-AFN4-55PTN

A 7.4V 3500mAh lithium-ion battery pack replaces the Panasonic DMW-BLJ31 and includes a dual charger with percentage indicator

  • Replacement for Panasonic DMW-BLJ31 battery
  • 3500mAh capacity extends shooting time
  • 4V lithium-ion delivers reliable power
  • Smart chip regulates voltage and temperature
  • No memory effect allows flexible recharging

Replacement for Panasonic DMW-BLJ31

This Green Extreme lithium-ion battery pack replaces the Panasonic DMW-BLJ31 for compatible Lumix mirrorless cameras. It delivers 7.4V and 3500mAh capacity for extended shooting sessions. Internal smart chips regulate voltage, temperature and performance. The cells have no memory effect and support repeated charge cycles.

Photographers needing longer runtimes

The high-capacity cells suit photographers and videographers who require uninterrupted operation during long assignments. The included dual charger powers two packs simultaneously with a percentage indicator. Buyers who need a single battery without a charger should look at a different option. Users with cameras requiring a different battery form factor cannot use this pack.

3500mAh capacity at 7.4V

The 3500mAh rating at 7.4V is the key specification that determines whether this pack meets your runtime requirements. It exceeds the original manufacturer capacity for fewer battery changes. Verify your camera accepts the DMW-BLJ31 form factor before purchase. The kit includes two batteries and the dual charger.

How it compares

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

Price $61.99
Pricier than about 90% of the 5,900 comparable items (median $17.99).

Specifications

No published specifications for this item yet.

Questions about this item

How is the DMW-BLJ31 battery installed and what step is often missed?

Insert the 7.4V pack into the camera battery compartment until the latch clicks, then power on to confirm the smart chip communicates with the camera.

What maintenance or replacement will the 3500mAh pack need later?

Lithium-ion cells degrade over time; expect reduced runtime after several hundred cycles and replace the pack when capacity no longer meets your shooting needs.

What limit appears first during sustained use of the 7.4V battery?

Continuous high-drain recording will hit the thermal limit managed by the internal smart chip, causing the camera to throttle or shut down before the 3500mAh capacity is fully depleted.

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