Duracell Specialty J (7K67) 6V Alkaline Battery

The Duracell J (7K67) is a compact rectangular 6-volt alkaline battery designed for devices that require this exact form factor and terminal layout. It is commonly used in select medical instruments, specialty cameras, and niche electronics that call out “J” or “7K67” in the manual or battery bay.

When to Choose

• Use if your device specifically lists J or 7K67 on the battery door, label, or manual.
• Choose for reliable starts and steady output in intermittent-use devices (e.g., diagnostic tools, specialty meters).
• Good fit when a rectangular enclosure and end-contact geometry are required.

Avoid If

• Your device requires cylindrical cells (AA/AAA), 9V blocks, coin/button cells, or photo lithium formats like 2CR5 or CR-P2.
• You need rechargeable power; J alkaline is primary (single-use) and not intended for charging.

Key Advantages

• Distinctive rectangular shape for tight compartments where cylindrical cells won’t fit.
• 6V output supports electronics that need higher voltage than a single 1.5V cell.
• Consistent performance for both intermittent and moderate continuous loads.

Compatibility Notes

• Match the code exactly: J or 7K67. Do not substitute 9V batteries, 4LR44/28A cylindrical 6V cells, or lithium photo packs (2CR5, CR-P2). They differ in size, terminals, and voltage characteristics.
• Mixing battery types or brands in adapters can cause poor contact, erratic operation, or damage.

Quick Specs

• Chemistry: Alkaline (primary, non-rechargeable)
• Nominal Voltage: 6V
• Format: J / 7K67 rectangular with end contacts
• Use Case: Select medical devices, specialty cameras, niche/legacy electronics

Installation

1. Confirm the marking J or 7K67 on your device or manual.
2. Align the battery so the terminals meet the device contacts; do not force.
3. Clean contacts with a dry, lint-free cloth before seating.
4. Close the compartment fully and verify normal operation.

Expected Runtime

Runtime depends heavily on device load. As a guide: low-drain indicators can run for weeks to months; moderate intermittent use typically lasts several weeks; high-drain or frequent-use tools may require more frequent replacement. For critical devices, keep a tested spare on hand.

Care, Storage, and Safety

• Store in original packaging at room temperature, away from heat and humidity.
• Remove from devices not used for extended periods to reduce leakage risk.
• Do not charge, short, or disassemble. Keep away from children and pets.
• Recycle or dispose per local guidelines; follow device manufacturer service intervals.

Troubleshooting

• Device will not power: Verify the battery is J/7K67 and oriented correctly; check for bent or recessed contacts.
• Intermittent operation: Reseat the battery, clean contact pads, and ensure the door latches fully.
• Short life: High current draw or continuous operation reduces runtime; carry a spare and power down when not in use.

FAQs

Is the J battery rechargeable?

No. It is a primary alkaline battery and should not be recharged.

Is it the same as a 9V battery?

No. Although both are rectangular, a 9V has different size, terminals, and voltage. They are not interchangeable.

Are there lithium equivalents?

Direct lithium equivalents for the J shape are uncommon. Use only what your device specifies.

How should I store spares?

Keep unopened batteries in a cool, dry place. Avoid extreme heat and do not store in a device.