User Manual Q&AAnswer
Feb 21, 2025 - 02:54 AM
To install the AC1118 battery in a legacy Mark-10 gauge (Series BG, BGI, EG, or CG), you will need to make some modifications. Please follow the steps below:
1. Separate the two halves of the gauge housing by loosening the captive screws and pulling the two halves apart.
2. Locate the auxiliary PCB (printed circuit board) on the right half of the housing, adjacent to the battery. Remove the existing battery before starting the modifications.
3. Identify the R4 resistor, which is brown in color, with the thermistor (silver color) soldered to it. The connection between these two components is highlighted with a yellow arrow in the instructions.
4. Use a pair of wire cutters to cut the connection between the R4 resistor and the thermistor.
5. Twist the thermistor away from the resistor or cut it out completely.
6. Note the absence of the connection, identified by the yellow arrow in the instructions.
7. Install the new AC1118 battery and reassemble the two halves of the gauge housing.
By following these steps, you will be able to install the AC1118 battery in your legacy Mark-10 gauge. Please note that failure to perform these modifications will not cause damage to the gauge, but the battery's charge duration will be significantly reduced. If you have any further questions or need additional assistance, you can contact Mark-10 Corporation through their website, email, or phone numbers provided in the instructions.
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