v2 Battery Replacement
Replace the battery on a v2 Sensor
Prior to October 2021, TankMate v2 sensors were supplied with a single C size, 3.6V lithium battery. These can be hard to source, and there are a variety of similar batteries that do not work in a TankMate sensor. We recommend installing the AA battery adapter - sold here.
Note: the following battery types will not be suitable to power a TankMate unit
Heavy duty type cells
A single 1.5V C-size cell
ER26500 C-size lithium
Tools required: Phillips / Pozi screwdriver #2; Flat screwdriver #1
Recommended AA Batteries: Energizer Ultimate Lithium L91 (AA size, 1.5v) / or Alkaline type
Models with a v2.60 PCB use a plug in connector for the battery, and do not have screw terminals
Open the sender unit - remove the 4 x screws on the lid
Turn the unit OFF, using the slide switch
Remove the existing C-size lithium battery
*If your unit has a plug in connector (v2.60) - pull out the existing battery plug (with pliers) and insert the plug for the new 3 x AA battery pack. Skip steps 5-8.
Undo the two screw terminals (marked 1 and 2 below) and remove the existing battery leads
If present - remove the C-size battery holder - held down with double sided tape
Insert the leads for the new 3 x AA battery pack. The wiring should match the image below: 1. RED || 2. BLACK
Tighten the screw terminals
Insert the 3 x AA cells
Power the unit ON (check status LED). If the LED does not blink, check the battery connections
Close the lid, ensuring the seal is in place. Replace and tighten the 4 x screws
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