Batteries / BPALK
BPALK 12 V, 7 Ah Alkaline Battery Pack with Backup Pack
Power Supply for Data Loggers
Also used as a separate auxiliary supply for remote sensors or peripherals
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The BPALK is a battery pack for powering dataloggers and peripherals. The BPALK includes eight replaceable D cell alkaline batteries. To ensure power is not lost while the D cell batteries are replaced, the BPALK has a 12 V backup battery pack. This pack uses eight AA batteries, which are not included.

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Detailed Description

The BPALK can power a CR500, CR510, CR10, CR10X, CR800, CR850, or CR1000 datalogger, as well as the datalogger's peripherals. It consists of the alkaline batteries, battery connectors, and the temporary 12 V AA alkaline battery pack used during D cell replacement.

The BPALK can also be used as a separate auxiliary 12 V power supply to power remotely located sensors or peripherals. The system must have a common ground.

Alkaline batteries are not rechargeable, and their Amp hour ratings decrease with temperature extremes. Alkaline batteries may leak when used outside the temperature range of -25° to +50°C, or when the battery voltage drops below 9.6 V.


Battery Type Alkaline
Nominal Rating 7.5 Ah (@ 20°C)
Batteries Needed 8 not-rechargeable alkaline D cells (included)
Output Voltage 12 Vdc
Operating Temperature Range -25° to +50°C
  • 15.2 x 7.4 x 8.0 cm (6.0 x 2.9 x 3.2 in.) without connectors and mounts
  • 18.1 x 7.4 x 8.0 cm (7.1 x 2.9 x 3.1 in.) with connectors and mounts
Weight 1.8 kg (4 lb)


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800 (retired)
CR850 (retired)
CR9000 (retired)
CR9000X (retired)

Mounting Equipment

Product Compatible Note


Product Compatible Note

Additional Compatibility Information

Enclosure Considerations

A desiccated, non-condensing environment is required. The BPALK includes built-in keyhole flanges for mounting to the backplate of a Campbell Scientific enclosure.

Frequently Asked Questions

Number of FAQs related to BPALK: 1

  1. The operating voltage is 9.6 to 16 Vdc. The data logger will shut down at 9.6 Vdc. When this happens, a counter is incremented in the data logger Status table (low12Vcount). In general, 12 to 14 Vdc is a normal range. Voltages above 16 Vdc could damage the data logger and cause bad measurements. Therefore, the resulting data should be reviewed carefully. Sustained voltages in excess of 16 Vdc can damage the data logger and the wiring panel.

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