The ShapeArray Field Power Unit (SAAFPU) is a portable, rugged, all-in-one power and communication device designed specifically for manual data collection in field. The battery in the SAAFPU can be field replaced in situations where the built-in battery is no longer working as expected. A replacement battery should have the following specifications:

  • Valve-Regulated Lead Acid (VRLA) battery (also referred to as Sealed Lead Acid battery or non-spillable battery)
  • Voltage: 12 V
  • Capacity: 7.2 Ah
  • Length: 5.945" (151.0 mm)
  • Width: 2.539" (64.5 mm)
  • Height: 3.702" (94.0 mm)
  • Total Height including terminals: 3.937" (100.0 mm)
  • Terminal size: 0.187" (4.75 mm)
  • Example models: Panasonic LC-R127R2P or Peak Energy PK12V7.2F1

Step 1 - Remove Screws from the Mounting Panel

Open the SAAFPU's water resistant enclosure and disconnect any hardware attached to ports on the mounting panel.

NOTE: The power cable is not removable and will remain attached.

Use a Phillips screw driver to remove the five screws holding the mounting panel in place.

Figure 1: Five Phillips screws (circled in green) hold the mounting panel in place

Step 2 - Remove the Mounting Panel

Slide the panel down slightly until you can reach your fingers under it and the battery. Gently lift and flip the panel assembly over and rest it upside down on the SAAFPU enclosure. Ensure you have firm grip on the panel assembly and that the battery is supported. Be careful that the RS232 connector for the Bluetooth adapter does not impact on the hardware for the strap bracket inside the enclosure.

WARNING: The mounting panel assembly is connected to ground wires and the Amphenol connector on the inside of the enclosure. Be careful not to pull these wires apart or disconnect them as you remove and flip the panel assembly.

Figure 2: Lifting the mounting panel and battery out of the enclosure

Step 3 - Disconnect and Remove the Battery

With the panel assembly and battery resting on the enclosure, lift the battery from the battery bracket in the mounting panel and reorient it so that the terminals are facing up. Remove the foam pieces around the battery for use on the new battery.

Figure 3: The battery after it has been lifted off the panel and reoriented with the terminals facing up

Disconnect the red wire connected to the positive terminal by pulling its blue plastic connector. Then, disconnect the black wire connected to the negative terminal by pulling its blue plastic connector.

Figure 4: Disconnect the red wire first and then the black wire

Remove the now disconnected battery from the panel.

Step 4 - Insert and Connect New Battery

Place the new battery in the battery bracket in the mounting panel with the terminals facing up, as shown in Figure 4 above. Connect the black wire to the negative terminal and then connect the red wire to the positive terminal. Lift the battery and place it on its side in the battery bracket in the mounting panel. Use the foam pieces removed in step 3 to ensure the battery fits snugly in the battery bracket. The battery should be positioned so that the terminals are facing the inside of the 'L' shape of the mounting panel. The foam pieces and battery orientation are shown in Figure 5 below.

Figure 5: The battery is set on its side in the battery bracket in the mounting panel. The foam pieces prevent the battery from moving around in the bracket.

Step 5 - Replace the Mounting Panel and Battery in the SAAFPU Enclosure

Lift the mounting panel, flip it over, and insert it into the SAAFPU's enclosure. Angle the mounting panel such that the RS232 connector for the Bluetooth adapter will fit under the hardware for the strap bracket inside the SAAFPU enclosure.

WARNING: Ensure you have a firm grip on the battery and support it. Ensure that no wires are pinched or pulled apart as you reinsert the mounting panel into the SAAFPU enclosure.  

Figure 6: Flip the mounting panel while supporting the battery. Insert it into the SAAFPU enclosure.

Step 6 - Screw the Mounting Panel into Place

Slide the mounting panel back up to the top of the SAAFPU enclosure in the position it was in when it was first removed. Secure the mounting panel to the SAAFPU enclosure with five screws, as shown in Figure 1.

Step 7 - Charge the SAAFPU and Test the Battery

Once the SAAFPU has been reassembled, it should be plugged into a mains power source and charged overnight. Once charged, the battery should be tested with the battery meter on the mounting panel inside the enclosure.