MN-100 series battery replacement

All TackTick wireless devices use the battery packs as a main source of power to communicate with other devices. If the internal battery goes below operating voltage (<2.4v), they will stop communicating regardless of if you have added power to charge the batteries.

If the battery is flat or below operating voltage, it can be replaced.

Loosen the rear cover plate by removing the small screws with a Torx 6 bit. After removing the plate, disconnect the cable and reinstall the new battery pack in reverse order.

Note: The new battery is "dry pre-charged" and must now be properly charged before reaching its full capacity. Depending on the UV intensity, a 100% charge can take up to three days.

To determine whether the batteries are truly defective or whether they're still accepting a charge, you can connect the MN-100 instruments to 12V and then directly monitor the battery voltage with a voltmeter. This should slowly increase (by individual increments to the second decimal place every 30 seconds or so). If you now remove the 12V, the battery should retain its charge and perhaps drop a little to the second decimal place, but it shouldn't immediately collapse.

You can also power the instruments directly with 3V at the battery connection even when the cover is open. The small triangles on the display indicate the charging intensity. When charging with a 12V connection, at least two of the three triangles on the display should be visible. This also applies to solar charging.

A battery with a charge of 1.xx V can probably still be "salvaged" or recharged, but a battery with only 0.xx V is probably no longer able to hold a charge. The part number for the battery pack for the Hull Transmitter (and the Wireless NMEA Interface T122) is TA119, which allows you to order the replacement battery from a Raymarine dealer.

Replacing the battery in other Raymarine wireless devices is similar, including the Maxis (2xTA119), the Hull Transmitter and the Wireless Interface (both TA119). A battery pack (TA125) is also available for the T120 wind transducer, but considerable manual dexterity is required to disassemble everything and reassemble it in a watertight manner. We strongly recommend visiting a Raymarine service partner to have the wind transducer Battery replaced.